Multiple choice

40 men can complete a work in 15 days. Three days after they started working, 20 more men joined them. In how many days the total work will be completed?

  1. 12

  2. 13

  3. 11

  4. 10
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Total work = 40 × 15 = 600 man-days. Work done in first 3 days = 40 × 3 = 120 man-days. Remaining work = 480 man-days, to be done by 60 men (40 + 20). Time needed = 480/60 = 8 days. Total time = 3 + 8 = 11 days.

Keep practicing — related questions