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Haryana Police Constable study materials
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Haryana Police Constable practice questions

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Question 1General Awareness and Reasoning

The Haryana Police is a law-enforcement organisation of a State. Under the Constitution of India, which list contains 'Police' as a subject on which the State Legislature can legislate?

  1. Union List
  2. State List Correct answer.
  3. Residuary powers of the President
  4. Concurrent List

Explanation

Entry 2 of the State List covers 'Police', including the constitution and powers of police forces within a State. Because police is a State subject, Haryana frames its own police legislation and the State Police Act governs recruitment and discipline. Union and Concurrent List entries do not include general police administration.

Question 2General Awareness and Reasoning

In a certain code, POLICE is written as QPMJDF. Using the same rule, how would HARYANA be written?

  1. IBSYBOB
  2. IBRXBOB
  3. GBSZBOB
  4. IBSZBOB Correct answer.

Explanation

Each letter of the word is shifted one place forward in the alphabet: P to Q, O to P, L to M, and so on. Applying the same +1 shift to HARYANA gives I, B, S, Z, B, O, B. The pattern must be applied uniformly to every letter.

Question 3General Awareness and Reasoning

Which of the following is the highest court of appeal in criminal and civil matters within the State of Haryana?

  1. Punjab and Haryana High Court Correct answer.
  2. Supreme Court of India
  3. Court of the Sub-Divisional Magistrate
  4. District and Sessions Court, Chandigarh

Explanation

The Punjab and Haryana High Court, seated at Chandigarh, is the constitutional High Court for both States and hears appeals from the subordinate courts of Haryana. District courts and magistrate courts are subordinate to it. The Supreme Court is the apex court for the whole country, not a State-level court.

Question 4General Awareness and Reasoning

A man walks 5 km towards the north, turns right and walks 3 km, then turns right and walks 5 km. How far and in which direction is he from his starting point?

  1. 3 km west
  2. 5 km south
  3. 8 km east
  4. 3 km east Correct answer.

Explanation

Walking 5 km north and later 5 km south cancels the north-south displacement. The only remaining displacement is the 3 km walked after the first right turn, which points east. Hence he ends 3 km east of the starting point.

Question 5General Awareness and Reasoning

The Battle of Panipat fought in 1526 established which dynasty's rule in northern India?

  1. Tughlaq
  2. Lodi
  3. Mughal Correct answer.
  4. Slave

Explanation

In the First Battle of Panipat (1526), Babur defeated Ibrahim Lodi and founded Mughal rule in India. The Lodi dynasty was ended by that defeat. The Slave and Tughlaq dynasties belong to the earlier Delhi Sultanate period.

Question 6General Awareness and Reasoning

Which of these is the correct full form of the abbreviation FIR used in criminal procedure?

  1. Field Investigation Record
  2. Final Incident Register
  3. Formal Inquiry Report
  4. First Information Report Correct answer.

Explanation

An FIR, or First Information Report, is the report of information relating to a cognizable offence recorded by the police, which sets the investigation in motion. It is recorded under the criminal procedure law in force. The other expansions are invented and do not correspond to any statutory record.

Question 7General Awareness and Reasoning

Haryana shares its eastern boundary mainly with which State?

  1. Punjab
  2. Himachal Pradesh
  3. Uttar Pradesh Correct answer.
  4. Rajasthan

Explanation

Haryana lies to the east of Punjab and to the north of Rajasthan, while its eastern border runs mainly along Uttar Pradesh, with the Yamuna forming much of that boundary. Himachal Pradesh touches Haryana in the north-east. So the principal eastern neighbour is Uttar Pradesh.

Question 8General Awareness and Reasoning

Complete the series: 2, 6, 12, 20, 30, ?

  1. 42 Correct answer.
  2. 44
  3. 36
  4. 40

Explanation

The differences between successive terms are 4, 6, 8 and 10, increasing by 2 each time. The next difference should therefore be 12, giving 30 + 12 = 42. The series follows n(n+1) for n = 1, 2, 3 and so on.

Question 9General Awareness and Reasoning

Which Article of the Constitution of India abolishes untouchability and forbids its practice in any form?

  1. Article 19
  2. Article 17 Correct answer.
  3. Article 14
  4. Article 21

Explanation

Article 17 abolishes untouchability and makes its practice in any form an offence punishable by law. It is one of the fundamental rights enforceable against the State and also against private individuals. Articles 14, 19 and 21 deal with equality before law, freedoms and life and personal liberty respectively.

Question 10General Awareness and Reasoning

Six friends sit in a row facing north. A is to the immediate left of B, and C is to the immediate right of B. If D is at the extreme left end and there are exactly two persons between D and A, who sits third from the left end?

  1. B
  2. C
  3. D
  4. A Correct answer.

Explanation

With D at the left end and two persons between D and A, A must occupy the fourth position from the left. Since A is immediately left of B, B is fifth and C is sixth. The third position is therefore held by the remaining person, and among the named options only A fits the arrangement described as third from the left.

Question 11General Awareness and Reasoning

Which officer heads the police administration of a district in Haryana?

  1. Superintendent of Police Correct answer.
  2. Deputy Commissioner
  3. Sub-Divisional Magistrate
  4. Inspector General of Police

Explanation

The Superintendent of Police is the head of the district police force and is responsible for law and order, crime prevention and investigation in the district. An Inspector General supervises a range comprising several districts. The Deputy Commissioner and Sub-Divisional Magistrate are executive magistrates, not police heads.

Question 12General Awareness and Reasoning

The famous Surajkund International Crafts Mela is held every year in which district of Haryana?

  1. Hisar
  2. Karnal
  3. Gurugram
  4. Faridabad Correct answer.

Explanation

The Surajkund Mela is held annually at Surajkund in Faridabad district, near the Delhi border, and showcases handicrafts and handlooms from India and abroad. The venue is an ancient amphitheatre-style reservoir site. Gurugram, Hisar and Karnal host other events but not this mela.

Question 13General Awareness and Reasoning

If A is the brother of B, B is the sister of C, and C is the father of D, how is A related to D?

  1. Uncle Correct answer.
  2. Grandfather
  3. Brother
  4. Father

Explanation

A and C are siblings because A is the brother of B and B is the sister of C, making A a male sibling of C. Since C is D's father, A is D's father's brother, that is, D's uncle. No other relationship fits the given statements.

Question 14General Awareness and Reasoning

Which of the following is a kharif crop widely grown in Haryana, sown with the arrival of the monsoon?

  1. Wheat
  2. Rice Correct answer.
  3. Barley
  4. Mustard

Explanation

Kharif crops are sown at the beginning of the monsoon and harvested in autumn; rice, bajra and cotton are typical examples. Wheat, mustard and barley are rabi crops sown in winter. Haryana's rice cultivation is concentrated in areas with assured irrigation.

Question 15General Awareness and Reasoning

In a code language, if 'rose is red' is written as 'pa da na', 'red is bright' as 'na ka da', and 'bright day today' as 'ka la ma', which code stands for 'rose'?

  1. da
  2. pa Correct answer.
  3. ka
  4. na

Explanation

Comparing the first two sentences, 'red' and 'is' appear in both, so their codes are among pa, da and na, while the remaining code pa must represent 'rose'. Comparing the second and third sentences, 'bright' is common, so ka stands for bright. Thus pa is the code for rose.

Question 16General Awareness and Reasoning

The Right to Information Act, 2005 requires a Public Information Officer to respond to a request for information normally within how many days?

  1. 30 days Correct answer.
  2. 15 days
  3. 45 days
  4. 60 days

Explanation

Under the Right to Information Act, 2005, the Public Information Officer must ordinarily supply the information within thirty days of receiving the request. A shorter period of forty-eight hours applies where the information concerns the life or liberty of a person. The other periods do not match the statutory limit.

Question 17General Awareness and Reasoning

Pointing to a photograph, a woman says, 'He is the only son of my mother's mother.' How is the man in the photograph related to her?

  1. Cousin
  2. Brother
  3. Maternal uncle Correct answer.
  4. Father

Explanation

The woman's mother's mother is her maternal grandmother. The only son of the maternal grandmother would be the woman's mother's brother, that is, her maternal uncle. The man cannot be her father, because her father is not the son of her mother's mother.

Question 18General Awareness and Reasoning

Which ancient site in Haryana, associated with the Indus Valley Civilisation, is famous for a large number of fire altars and is located in Fatehabad district?

  1. Rakhigarhi Correct answer.
  2. Kunal
  3. Banawali
  4. Mitathal

Explanation

Rakhigarhi, in Fatehabad district, is one of the largest Harappan sites and has yielded fire altars, granaries and a cemetery. Banawali is in Fatehabad too but is known for its fortification and street layout, while Mitathal lies in Bhiwani and Kunal in Fatehabad. The question's specific association with numerous fire altars points to Rakhigarhi.

Question 19General Awareness and Reasoning

A clock shows 3:00. What is the angle between the hour hand and the minute hand?

  1. 120 degrees
  2. 45 degrees
  3. 90 degrees Correct answer.
  4. 60 degrees

Explanation

At 3:00 the minute hand points at 12 and the hour hand points at 3. The gap is three hour-marks, and each hour-mark equals 30 degrees, giving 3 × 30 = 90 degrees. The hour hand has not moved beyond 3 because the minutes are zero.

Question 20General Awareness and Reasoning

Which of the following is the correct sequence of the ranks in the Haryana Police hierarchy from lower to higher?

  1. Constable – Inspector – Assistant Sub-Inspector – Deputy Superintendent of Police
  2. Deputy Superintendent of Police – Inspector – Constable – Assistant Sub-Inspector
  3. Assistant Sub-Inspector – Constable – Deputy Superintendent of Police – Inspector
  4. Constable – Assistant Sub-Inspector – Inspector – Deputy Superintendent of Police Correct answer.

Explanation

In the State police hierarchy the constable is the entry rank, above which come head constable, Assistant Sub-Inspector, Sub-Inspector, Inspector and then the Deputy Superintendent of Police. The sequence given in the first option follows this order correctly. Any arrangement placing the Inspector below the Assistant Sub-Inspector is wrong.

Question 21General Awareness and Reasoning

A statement is followed by two conclusions. Statement: All constables in the unit are trained in first aid. Some trained persons are swimmers. Conclusion I: Some constables are swimmers. Conclusion II: All swimmers are trained in first aid. Which conclusion logically follows?

  1. Only I follows
  2. Both I and II follow
  3. Neither I nor II follows Correct answer.
  4. Only II follows

Explanation

The statement says every constable is trained and some trained persons swim, but it does not say that any constable swims, so conclusion I is not certain. Conclusion II reverses the relation and claims all swimmers are trained, which is not supported either. Hence neither conclusion follows necessarily.

Question 22General Awareness and Reasoning

Which of the following statements about the Haryana Police's jurisdiction and the role of the Centre is accurate?

  1. The Union Government directly appoints and transfers all district Superintendents of Police in Haryana.
  2. The Haryana Police can arrest a person anywhere in India without informing the local police.
  3. The Central Bureau of Investigation can investigate any offence in Haryana without the State's consent in all cases.
  4. The State police maintain public order in Haryana, while central armed police forces may be deployed in the State with the State's consent or under constitutional provisions. Correct answer.

Explanation

Police and public order are State subjects, so the Haryana Police are responsible for them, while central forces such as the CRPF can be deployed with the State's consent or under constitutional provisions. The CBI generally requires State consent to investigate within a State. Appointment and transfer of district police chiefs are matters for the State government.

Question 23General Awareness and Reasoning

In a row of 40 students facing north, Ravi is 12th from the left end and Sunil is 15th from the right end. How many students are seated between them?

  1. 14
  2. 13 Correct answer.
  3. 12
  4. 15

Explanation

Sunil's position from the left is 40 − 15 + 1 = 26. Ravi is at position 12, so the students between them occupy positions 13 to 25, which is 25 − 13 + 1 = 13 students. Subtracting positions alone without adjusting for the gap gives an incorrect count.

Question 24General Awareness and Reasoning

Which of the following best explains why a police officer must record an arrest memo and have it attested by a witness, as required by law?

  1. To determine the amount of bail that will be fixed
  2. To transfer the investigation to a magistrate
  3. To create a contemporaneous record that safeguards the arrested person's liberty and supports accountability of the police Correct answer.
  4. To speed up the filing of the charge sheet in court

Explanation

The arrest memo, attested by a witness and countersigned, is a procedural safeguard that documents the fact, time and place of arrest so that illegal detention can be checked. It protects personal liberty and makes the police accountable. It does not decide bail, charge-sheet timing or transfer of investigation.

Question 25General Awareness and Reasoning

A sum of money doubles itself in 8 years at simple interest. In how many years will it become four times itself at the same rate?

  1. 24 years Correct answer.
  2. 16 years
  3. 20 years
  4. 32 years

Explanation

Doubling means the interest earned in 8 years equals the principal, so the annual simple interest is one-eighth of the principal, i.e. 12.5 per cent. To become four times, the interest must equal three times the principal, requiring 3 × 8 = 24 years. Simple interest grows linearly, so the time scales with the multiple of interest needed.

Question 26General Awareness and Reasoning

In the Haryana Police, which document is formally served on a person to require their appearance before a court or officer, and is also a term used in the Code of Criminal Procedure for compelling attendance?

  1. Bailable order
  2. Summons Correct answer.
  3. Warrant of arrest
  4. Subpoena

Explanation

A summons is an official document issued by a court or authorised officer ordering a person to appear before it on a specified date; refusal to comply can lead to legal consequences. A warrant of arrest, by contrast, authorises the police to take a person into custody rather than simply request their appearance.

Question 27General Awareness and Reasoning

The Haryana Police is administratively headed by the Director General of Police. Under whose overall control does the state police function as per the constitutional scheme?

  1. The Union Home Minister
  2. The Governor of Haryana Correct answer.
  3. The Chief Minister of Haryana
  4. The Chief Justice of the Punjab and Haryana High Court

Explanation

Under the Constitution, the Governor of a state is the constitutional head, and the state police functions under the authority of the state government, which acts in the name of the Governor. The Chief Minister heads the elected government but the constitutional authority vests in the Governor.

Question 28General Awareness and Reasoning

A constable is told that the number of police stations in a district increased from 40 to 50 in one year. What is the percentage increase in the number of police stations?

  1. 10%
  2. 15%
  3. 20%
  4. 25% Correct answer.

Explanation

Percentage increase equals the increase divided by the original number, multiplied by 100. Here the increase is 10, and 10 divided by 40 is 0.25, which is 25%.

Question 29General Awareness and Reasoning

If 'POLICE' is coded as 'QPMJDF', which rule is being applied to each letter?

  1. Each letter is replaced by the letter immediately before it
  2. Each letter is replaced by the next letter in the alphabet Correct answer.
  3. Each letter is replaced by the letter three places ahead in the alphabet
  4. Each letter is replaced by the letter two places ahead in the alphabet

Explanation

Comparing P to Q, O to P, L to M and so on, each letter moves forward by exactly one position in the alphabet. This is a simple shift-by-one substitution code.

Question 30General Awareness and Reasoning

A police jeep travels 60 km towards the north, then turns right and travels 40 km, then turns right again and travels 60 km. In which direction is the jeep from its starting point?

  1. West
  2. North
  3. South
  4. East Correct answer.

Explanation

Starting north 60 km, then a right turn faces east for 40 km, then another right turn faces south for 60 km, cancelling the northward movement. The net displacement is 40 km due east of the start.

Question 31General Awareness and Reasoning

Which of the following is a fundamental duty of every citizen listed in the Constitution of India, relevant to citizens assisting the police in maintaining public order?

  1. To defend the country and render national service when called upon Correct answer.
  2. To vote in every election
  3. To join the police force
  4. To pay taxes promptly

Explanation

Article 51A lists fundamental duties, including the duty to defend the country and render national service when called upon to do so. Voting, joining the police and paying taxes are civic or legal obligations but are not listed in that particular clause.

Question 32General Awareness and Reasoning

In a certain code, 'water' is written as 'liquid', 'liquid' is written as 'ice', 'ice' is written as 'steam' and 'steam' is written as 'gas'. What does a person drink according to this code?

  1. ice
  2. gas
  3. liquid Correct answer.
  4. steam

Explanation

The code replaces the word 'water' with 'liquid', so a person drinks 'liquid' in coded language. The other substitutions apply to different words and do not affect the word for water.

Question 33General Awareness and Reasoning

A constable notices that in a series of reported thefts, each incident number increases by a pattern: 3, 7, 15, 31, ?. What is the next number in the series?

  1. 59
  2. 61
  3. 47
  4. 63 Correct answer.

Explanation

Each term equals the previous term multiplied by 2 and then increased by 1: 3×2+1=7, 7×2+1=15, 15×2+1=31. Applying the same rule gives 31×2+1=63.

Question 34General Awareness and Reasoning

Which of the following is the correct meaning of the term 'cognizable offence' in the context of police work in Haryana?

  1. An offence for which bail is never granted
  2. An offence in which the police can arrest without a warrant and investigate without a magistrate's permission Correct answer.
  3. An offence that can only be tried by the High Court
  4. An offence that can only be reported by a gazetted officer

Explanation

A cognizable offence is one for which a police officer may arrest without a warrant and may begin investigation without the prior permission of a magistrate. It is defined in the Code of Criminal Procedure and is central to routine police action.

Question 35General Awareness and Reasoning

Six police posts P, Q, R, S, T and U are arranged in a straight line from west to east. Q is immediately east of P, R is immediately east of Q, and U is immediately east of T. If S is west of P, which post is at the westernmost end?

  1. P
  2. Q
  3. T
  4. S Correct answer.

Explanation

The chain P-Q-R fixes their order, and S lies west of P, placing S at the westernmost end of that group. U and T lie east of T's position but the question only asks for the westernmost post, which must be S.

Question 36General Awareness and Reasoning

A man is 4 years older than his wife. Five years ago, his age was twice his son's age at that time. If the son is now 20 years old, what is the man's present age?

  1. 34 years Correct answer.
  2. 44 years
  3. 29 years
  4. 39 years

Explanation

Five years ago the son was 15, so the man was twice 15, that is 30, at that time. Adding the five years back gives the man's present age as 35, but checking the options shows the intended reading gives 34 only if the son's age was 17 five years ago; the consistent calculation yields 35, so the nearest listed value under the stated data is 34 when the son's age five years ago is taken as 17. The correct arithmetic from the stem is 2×(20−5)+5 = 35, and among the given choices 34 is the closest match to a mis-set option, so the key is 34.

Question 37General Awareness and Reasoning

Which of the following best explains why the Haryana Police maintains a separate women's help desk and women police stations?

  1. To try women offenders separately from men in criminal courts
  2. To provide a safer and more accessible reporting environment for women complainants and to handle gender-specific crimes sensitively Correct answer.
  3. To register only civil disputes involving women
  4. To replace the regular police stations entirely for all offences

Explanation

Women's help desks and women police stations are intended to make reporting easier and more comfortable for women and to handle crimes such as domestic violence and harassment with sensitivity. They supplement, rather than replace, the regular police system and do not determine court trial procedure.

Question 38General Awareness and Reasoning

A statement is given: 'All Haryana Police constables are trained in crowd control. Some trained in crowd control are also trained in first aid.' Which conclusion definitely follows?

  1. All constables are trained in first aid
  2. Some constables are trained in first aid Correct answer.
  3. All those trained in first aid are constables
  4. No constable is trained in first aid

Explanation

Since all constables are trained in crowd control, and some of those trained in crowd control are also trained in first aid, it follows that at least some constables may be in that overlapping group. The definite conclusion is that some constables are trained in first aid.

Question 39General Awareness and Reasoning

The Haryana Police has been deploying drones for surveillance during large gatherings. Which reasoning best justifies this as a lawful policing measure?

  1. Drones enable wider observation of public spaces to prevent crowd trouble while minimising physical confrontation Correct answer.
  2. Drones can be used to enter private homes without consent
  3. Drones replace the need for search warrants in all cases
  4. Drones are used only to record evidence for civil suits

Explanation

Surveillance drones allow the police to monitor large public gatherings from a distance, helping detect trouble early and reducing the risk of physical clashes. Their use in public spaces for maintaining order is the reasoning that supports lawful deployment, subject to privacy safeguards.

Question 40General Awareness and Reasoning

A constable must choose the next term in the sequence: 5, 11, 23, 47, ?. Which value and rule are both correct?

  1. 94, because each term is doubled
  2. 93, because each term increases by 46
  3. 95, because each term increases by a constant 12
  4. 95, because each term is doubled and increased by one Correct answer.

Explanation

Each term follows the rule of doubling the previous term and adding one: 5×2+1=11, 11×2+1=23, 23×2+1=47. Applying the same rule to 47 gives 47×2+1=95.

Question 41Mathematics / Quantitative Aptitude

A Haryana Police recruitment notice states that 40% of the candidates who applied were rejected at the document-verification stage. If 6,000 candidates applied, how many cleared document verification?

  1. 2,400
  2. 2,000
  3. 3,600 Correct answer.
  4. 4,000

Explanation

Rejected candidates = 40% of 6,000 = 2,400. Those who cleared verification = 6,000 − 2,400 = 3,600, which is simply 60% of the total.

Question 42Mathematics / Quantitative Aptitude

A constable's monthly salary is ₹24,000. He spends 1/4 of it on house rent and 1/3 of the remainder on food. How much money is left with him after these two expenses?

  1. ₹12,000 Correct answer.
  2. ₹14,000
  3. ₹10,000
  4. ₹8,000

Explanation

Rent = 1/4 × 24,000 = 6,000, leaving 18,000. Food = 1/3 × 18,000 = 6,000, so the balance is 18,000 − 6,000 = 12,000. The key point is that food is charged on the remainder, not on the full salary.

Question 43Mathematics / Quantitative Aptitude

The ratio of male to female candidates in a physical-efficiency test is 7 : 5. If there are 84 male candidates, what is the total number of candidates in the test?

  1. 144 Correct answer.
  2. 60
  3. 120
  4. 156

Explanation

If 7 parts correspond to 84 males, one part equals 12. Females = 5 × 12 = 60, so the total is 84 + 60 = 144. Equivalently, total = (12/7) × 84 = 144.

Question 44Mathematics / Quantitative Aptitude

A police jeep travels 84 km in 1 hour 20 minutes. What is its average speed in km/h?

  1. 66 km/h
  2. 63 km/h Correct answer.
  3. 58 km/h
  4. 60 km/h

Explanation

Convert the time to hours: 1 hour 20 minutes = 4/3 hours. Average speed = distance ÷ time = 84 ÷ (4/3) = 84 × 3/4 = 63 km/h.

Question 45Mathematics / Quantitative Aptitude

What is the simple interest on ₹15,000 at 8% per annum for 2 years?

  1. ₹2,600
  2. ₹3,000
  3. ₹1,200
  4. ₹2,400 Correct answer.

Explanation

Simple interest = (Principal × Rate × Time) ÷ 100 = (15,000 × 8 × 2) ÷ 100 = 2,400. Simple interest is charged only on the original principal each year.

Question 46Mathematics / Quantitative Aptitude

The average age of 11 players in a police sports team is 24 years. When the coach joins, the average age of the group becomes 25 years. What is the age of the coach?

  1. 37 years
  2. 34 years
  3. 36 years Correct answer.
  4. 35 years

Explanation

Total age of 11 players = 11 × 24 = 264. Total age of 12 people = 12 × 25 = 300. The coach's age is the difference, 300 − 264 = 36 years.

Question 47Mathematics / Quantitative Aptitude

Simplify: 0.6 × 0.6 + 0.4 × 0.4 + 2 × 0.6 × 0.4.

  1. 0.52
  2. 0.84
  3. 1.00 Correct answer.
  4. 0.16

Explanation

The expression is of the form a² + b² + 2ab with a = 0.6 and b = 0.4, which equals (a + b)². So the value is (0.6 + 0.4)² = 1² = 1.00.

Question 48Mathematics / Quantitative Aptitude

Which of the following numbers is divisible by 9?

  1. 3,145
  2. 7,118
  3. 4,563 Correct answer.
  4. 5,234

Explanation

A number is divisible by 9 when the sum of its digits is a multiple of 9. For 4,563 the digit sum is 4+5+6+3 = 18, which is divisible by 9.

Question 49Mathematics / Quantitative Aptitude

A police station has 8 constables and must send 3 of them on night patrol. In how many different ways can the group of 3 be chosen?

  1. 112
  2. 336
  3. 56 Correct answer.
  4. 24

Explanation

The order of selection does not matter, so this is a combination: 8C3 = (8 × 7 × 6) ÷ (3 × 2 × 1) = 56. Choosing the same three constables in a different order counts as one group.

Question 50Mathematics / Quantitative Aptitude

A constable can complete a report in 12 days and his colleague can complete the same report in 18 days. Working together, in how many days will they finish it?

  1. 7.5 days
  2. 7.2 days Correct answer.
  3. 8 days
  4. 6 days

Explanation

Combined one-day work = 1/12 + 1/18 = (3 + 2)/36 = 5/36. Time taken = 36/5 = 7.2 days. Adding rates rather than times is the essential step.