Multiple choice

A job can be completed by 12 men in 12 days. How many extra days will be needed to complete the job if 6 men leave after working for 6 days?

  1. 3

  2. 6

  3. 12

  4. 24
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Total work = 12 men × 12 days = 144 man-days. In the first 6 days with 12 men, work completed = 12 × 6 = 72 man-days. Remaining work = 144 - 72 = 72 man-days. After 6 men leave, only 6 men remain. Time needed for remaining work = 72/6 = 12 days. The question asks for EXTRA days beyond the original 12, so 12 more days are needed.

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