Aptitude:: Chain Rule

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

A. 12 B. 18
C. 22 D. 24
E. None of these    

Answer: Option D

Explanation:

Let the required number of days be x.

Less men, More days (Indirect Proportion)

 27 : 36 :: 18 : x        27 x x = 36 x 18

 x = 36 x 18
27

 x = 24.


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