Multiple choice

If 20 men take 15 days to complete a job, in how many days can 25 men finish that work?

  1. 9

  2. 10

  3. 16

  4. 12

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

Work is constant: 20 men * 15 days = 300 man-days. 25 men * x days = 300. x = 300 / 25 = 12 days.

AI explanation

The total work is 300 man-days (20 men multiplied by 15 days). Using the formula that work remains constant, 300 man-days divided by 25 men gives 12 days for 25 men to finish the work.

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