If 9 men or 15 women an do a piece of work in 25 days, then 39 men and 10 women will complete the same work in?
Q1. If 9 men or 15 women an do a piece of work in 25 days, then 39 men and 10 women will complete the same work in?
Answer: 5 days
Explanation: One man's work rate: 9 men = 15 women, so 1 man = 5/3 women. 39 men + 10 women = 65+10 = 75 women. Total work = 15×25 = 375 woman-days; 375÷75 = 5 days.