50 men can dig 40 holes in 30 days.How long will 25 men take to dig 20 holes?

Options

A. 15 days
B. `22(1)/(2)` days
C. 30 days
D. 45 days

Answer

C

Explanation

`because` 50 men can dig 40 holes in 30 days
`therefore` 25 men can dig 20 holes in
`(30xx50xx20)/(40xx25)=30 days`
TRICK
Number of men =`(x)/(2)`
and work =`(1)/(2)` Therefore,days required would be the same.