30 men can do a certain work in 15 days. They started working on the project but 5 of them leave after every five days. In how many days, will the work be completed now?
Q1. 30 men can do a certain work in 15 days. They started working on the project but 5 of them leave after every five days. In how many days, will the work be completed now?
Answer: 20 days
Explanation: Total work = 30 × 15 = 450 units; work done: days 1–5 (30 men) = 150, days 6–10 (25 men) = 125, days 11–15 (20 men) = 100, days 16–20 (15 men) = 75; total = 450, completed in 20 days.