Multiple choice

If 15 men can complete a piece of work in 24 days by working 8 hours a day, then in how many days can 18 men do the same work by working 5 hours a day?

  1. 24

  2. 32

  3. 22

  4. 28
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total work = 15 men × 24 days × 8 hours = 2880 man-hours. With 18 men working 5 hours daily: daily work = 18 × 5 = 90 man-hours. Days required = 2880 ÷ 90 = 32 days. This is a direct application of the man-hours concept where the total work remains constant. Options A (24 days) and C (22 days) underestimate the time, while D (28 days) is still insufficient.

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