Multiple choice

15 men can complete a construction project in 20 days. How many days will it take 25 men to finish the same project working at the same pace?

  1. 10 days

  2. 12 days

  3. 14 days

  4. 16 days

  5. 15 days
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This is an inverse proportion problem. Total man-days required = 15 * 20 = 300. For 25 men, the time taken = 300 / 25 = 12 days.

AI explanation

Using the formula for inverse proportionality between workers and time, the total work is 15 men multiplied by 20 days, equaling 300 man-days. Dividing this total work by the new count of 25 men gives 300 divided by 25. The result is 12 days.

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