Multiple choice

40 men can complete a piece of work in 18 days. 8 days after they start working together, 10 more men join them. How many days will they now take to complete the remaining work?

  1. 6

  2. 8

  3. 10

  4. 12

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total work = 40 * 18 = 720 man-days. Work done in 8 days = 40 * 8 = 320. Remaining work = 720 - 320 = 400. New number of men = 40 + 10 = 50. Days for remaining work = 400 / 50 = 8.

AI explanation

The total work is 720 man-days (40 x 18). In 8 days, the 40 men complete 320 man-days, leaving 400 man-days of work. With 50 men now working, the remaining work takes 400 / 50, which equals 8 days.