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

Solution(By Examveda Team)

Let the required number of days be x.
Less men, More days (Indirect Proportion)
$$\eqalign{ & \therefore 27:36::18:x \cr & \Rightarrow 27 \times x = 36 \times 18 \cr & \Rightarrow x = \frac{{36 \times 18}}{{27}} \cr & \Rightarrow x = 24 \cr} $$