10 men can complete a work in 7 days. But 10 women need 14 days to complete the same work. How many days will 5 men and 10 women need to complete the work?
Q1. 10 men can complete a work in 7 days. But 10 women need 14 days to complete the same work. How many days will 5 men and 10 women need to complete the work?
Answer: 7 days
Explanation: One man's daily rate = 1/70 and one woman's = 1/140; 5 men + 10 women = 5/70 + 10/140 = 1/14 + 1/14 = 1/7, so they finish in 7 days.