# How Many Men can do the Same Work?

42 men can do a piece of work in 18 days. How many men would be engaged to do the same work in 21 days?

- 36
- 24
- 30
- 44

**Answer: (1) 36
Explanation:-**

**Formula-**

M

_{1}D

_{1}= M

_{2}D

_{2}

where, M = number of men

D = number of day

According to question, 42 x 18 = M

_{2}x 21

M

_{2}= 42 x 18 /21 = 2 x 18

= 36 men

Hence, 36 men would be engaged to do the same work in 21 days.