#### Chain Rule Question & Answers

36 men can complete a piece of work in 18 days. In how many days will 27 men complete the same work ?

A) 24 days | B) 28 days |

C) 34 days | D) 35 days |

Explanation:

Less Men, means more Days {Indirect Proportion}

Let the number of days be x

then,

27 : 36 :: 18 : x

[Please pay attention, we have written 27 : 36 rather than 36 : 27, in indirect proportion, if you get it then chain rule is clear to you :)]

x = 24

So 24 days will be required to get work done by 27 men.

Subject: Chain Rule - Quantitative Aptitude - Arithmetic Ability

- Related Questions

If 36 men can do a piece of work in 25 hours, in how mwny hours will15 men do it?

A) 40 | B) 50 |

C) 60 | D) 70 |

Explanation:

Let the required no of hours be x. Then

Less men , More hours (Indirct Proportion)

15:36 ::25:x (15 x X)=(36 x 25)

Hence, 15 men can do it in 60 hours.

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Subject: Chain Rule - Quantitative Aptitude - Arithmetic Ability

If 20 men can build a wall 56 meters long in 6 days , what length of a similar wall can be built by 35 men in 3 days?

A) 46 | B) 47 |

C) 48 | D) 49 |

Explanation:

Let the required length be x meters

More men, More length built (Direct proportion)

Less days, Less length built (Direct Proportion)

(20 x 6 x X)=(35 x 3 x 56)

Hence, the required length is 49 m.

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Subject: Chain Rule - Quantitative Aptitude - Arithmetic Ability

2 men and 7 boys can do a piece of work in 14 days; 3 men and 8 boys can do the same in 11 days. Then, 8 men and 6 boys can do three times the amount of this work in

A) 18 days | B) 21 days |

C) 24 days | D) 30 days |

Explanation:

5 men= 10 boys 1man= 2 boys

(2 men+ 7 boys) = (2 x 2 +7) boys = 11 boys

( 8 men + 6 boys) = (8 x 2 +6) boys = 22 boys.

Let the required number of days be x.

More boys , Less days (Indirect proportion)

More work , More days (Direct proportion)

Hence, the required number of days = 21

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Subject: Chain Rule - Quantitative Aptitude - Arithmetic Ability

A contractor undertakes to do a piece of work in 40 days. He engages 100 men at the begining and 100 more after 35 days and completes the work in stipulated time. If he had not engaged the additional men, how many days behind schedule would it be finished?

A) 3 | B) 5 |

C) 6 | D) 9 |

Explanation:

men can finish the work in 1 day

4500 men can finish the work in 1 day. 100 men can finish it in = 45 days.

This is 5 days behind Schedule

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Subject: Chain Rule - Quantitative Aptitude - Arithmetic Ability

A certain number of men can finish a piece of work in 100 days. If there were 10 men less, it would take 10 days more for the work to be finished. How many men were there originally?

A) 75 | B) 82 |

C) 100 | D) 110 |

Explanation:

Originally let there be x men.

Less men, More days (Indirect Proportion)

(x-10) : x :: 100 :110 10x= 1100 x= 110

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Subject: Chain Rule - Quantitative Aptitude - Arithmetic Ability