Multiple choice

If 12 men can complete a piece of work in 20 days, then how many men are required to complete the same work in 16 days?

  1. 15

  2. 16

  3. 17

  4. 18

  5. 23
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A Correct answer
Explanation

This is an inverse proportion problem. The total work is 12 men * 20 days = 240 man-days. To complete the same work in 16 days, the number of men required is 240 / 16 = 15.

AI explanation

Using the formula M1 multiplied by D1 equals M2 multiplied by D2, we have 12 men multiplied by 20 days equals M2 men multiplied by 16 days. This gives 240 = 16 multiplied by M2. Solving for M2 gives 15, meaning 15 men are required to complete the work in 16 days.

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