Multiple choice

If 20 people can complete a task in 10 days, how many people are required to complete the same task in 4 days?

  1. 30

  2. 40

  3. 50

  4. 60
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Using the inverse proportion formula: M1*D1 = M2*D2. 20 * 10 = M2 * 4. 200 = 4 * M2. M2 = 50.

AI explanation

Using the formula for manpower estimation, the required number of people equals the total man-days divided by the available days. The total work is 20 people multiplied by 10 days, equaling 200 man-days. To complete this same work in 4 days, the required number of people is 200 divided by 4. The result is 50 people.

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