Multiple choice

If 40 men working 12 hours a day can complete a work in 8 days, then how many men working 4 hours a day can complete the same work in 16 days?

  1. 50

  2. 60

  3. 54

  4. 45
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is an inverse proportion problem. More hours per day means fewer men needed, and more days means fewer men needed. Total work = 40 × 12 × 8 = 3840 man-hours. New scenario: x men × 4 hours × 16 days = 3840. Solving: 64x = 3840, so x = 60 men.

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