32 men can dig a canal in 12 days. 3 days after they started working, 10 more men joined them. In how many more days will the remaining work be completed?
Show answer & explanation
Correct answer: B
Explanation
Total work = 32 × 12 = 384 man-days
Work done in the first 3 days = 32 × 3
= 96 man-days
Remaining work = 384 − 96
= 288 man-days
Total workers = 32 + 10 = 42
Time to complete the remaining work = 288 / 42
= 48/7= 6.85 days