Multiple choice

If 12 people can finish a piece of work in 5 days, how many additional people are required to complete the work in 3 days?

  1. 3

  2. 5

  3. 6

  4. 8

  5. 10
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Total work = 12 * 5 = 60 man-days. To finish in 3 days, we need 60 / 3 = 20 people. Additional people = 20 - 12 = 8.

AI explanation

By the inverse proportionality of workers and days, 12 people take 5 days to complete the task. The total work equals 12 multiplied by 5, which is 60 man-days. To finish this 60 man-day job in 3 days, you need 60 divided by 3, which equals 20 people. Therefore, 20 minus the original 12 people results in 8 additional people required.

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