12 men can finish a work in 15 days. After working for 5 days, 4 men leave. How many more days will the remaining men take to finish the work?
Show answer & explanation
Correct answer: C
Explanation
Total work = 12 × 15 = 180 man-days
Work done by 12 men in 5 days = 12 × 5 = 60 man-days
Remaining work = 180 - 60 = 120 man-days
Now, 4 men leave, so the remaining men = 12 - 4 = 8
Time taken to complete the remaining work = 120 ÷ 8 = 15 days