RRB NTPC · Question 39
10 men and 5 women can do a work in 60 days. If one man can do the work of two women, how long will 5 men and 20 women take to complete half of the work?
Show answer & explanation
Answer: (A) 25
Explanation
1 man = 2 women, so 10 men + 5 women = 25 women, and the work = 25 × 60 = 1500 woman-days. 5 men + 20 women = 30 women, so half the work (750) takes 750/30 = 25 days.