Multiple choice

15 men are employed to do a piece of work which they can finish in 10 days, but 5 men quit at the end of 5 days. In how many days will the remaining work be completed?

  1. 7.5 days

  2. 5 days

  3. 5.5 days

  4. 7 days
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Total work = 15 men * 10 days = 150 man-days. Work done in 5 days = 15 * 5 = 75 man-days. Remaining work = 150 - 75 = 75 man-days. Remaining men = 15 - 5 = 10. Days required = 75 / 10 = 7.5 days.

AI explanation

The total work is 150 man-days (15 men multiplied by 10 days). In the first 5 days, the work completed is 75 man-days (15 men multiplied by 5 days), leaving 75 man-days of work. With 5 men quitting, 10 men remain to finish the 75 man-days of work. Dividing 75 by 10 gives 7.5 days, so the remaining work will be completed in 7.5 days.

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