Multiple choice

A work can be completed by 15 men in 12 days. After working for 4 days, 5 men leave. How many more days will the remaining men take to finish the remaining work?

  1. 10 days

  2. 12 days

  3. 14 days

  4. 16 days

  5. 20 days
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Total work = 15 * 12 = 180 man-days. After 4 days, 15 * 4 = 60 man-days are done. Remaining work = 180 - 60 = 120 man-days. 5 men leave, so 10 men remain. Days to finish = 120 / 10 = 12 days.

AI explanation

Using the man-days formula, the total work is 15 men multiplied by 12 days, equaling 180 man-days. The work done in the first 4 days is 15 men multiplied by 4 days, equaling 60 man-days, leaving 120 man-days of remaining work. Since 5 men leave, 10 men are left to finish the job, so dividing the 120 remaining man-days by 10 men gives 12 days. The result is 12 days.

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