Multiple choice

16 men can complete a work in 12 days. They worked for 4 days. To finish the remaining work in 4 days, how many additional men are required?

  1. 12

  2. 16

  3. 18

  4. 14
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

16 men × 12 days = 192 man-days of work. In 4 days, 16 men complete 16×4 = 64 man-days. Remaining work = 192-64 = 128 man-days. To finish in 4 days: 128/4 = 32 men needed. Additional men = 32-16 = 16. Use the man-days formula: men × days = constant work.

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