Question

If 10 men can complete a piece of work in 30 days how many men are requiredto complete the same job in 25 days?

Answer 1

We must assume that all workmen work at the same rate, and keep it up forever.

More men ==> fewer days

so the proportion is:    30/25 = x/10

Cross-multiply the proportion:

300 = 25 x

Divide each side by 25 :

x = 300/25 = 12 men