Multiple choice

A work can be done by 5 men in 12 days. How many more men are required to do double the work in half time?

  1. 17

  2. 15

  3. 10

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

Work formula: (M1 * D1) / W1 = (M2 * D2) / W2. (5 * 12) / 1 = (M2 * 6) / 2. 60 = 3 * M2, so M2 = 20. Total men needed is 20. Since 5 are already there, 15 more are required.

AI explanation

Using the work formula (Men1 * Days1) / Work1 = (Men2 * Days2) / Work2, we substitute the given values to get (5 * 12) / 1 = (M * 6) / 2. Solving this equation yields 60 = 3M, which means the total men required are 20. Since 5 men were already working, the additional men required are 20 - 5 = 15.

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