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### Discussion :: Chain Rule

1. 36 men can complete a piece of work in 18 days. In how many days will 27 men complete the same work?

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

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 =$$\frac { 36*18 } { 27 }$$

x = 24.

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