Multiple choice

If 16 men working 12 hours a day can complete a work in 27 days, then working for how many hours a day can 18 men complete the work in 24 days?

  1. 9

  2. 18

  3. 16

  4. 12
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Using the work formula M1 × D1 × H1 = M2 × D2 × H2: 16 × 27 × 12 = 18 × 24 × H2. Solving gives 5184 = 432 × H2, so H2 = 12 hours. The man-hours required remain constant.

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