Question

A contractor employs 420 men to do some work in 9 months. How many extra men must he employ to complete the work in 7 months?

Answer 1

Step-by-step explanation:

9×420=7×l2 (T1×l1=T2×l2)

l2=9×420/7

l2=540mens

so extra men require to complete the task in 7 months are (540-420=120mens)

answer is 120