If a work can be completed by 5 men in 20 days, how many days will it take for 10 men to complete th

If a work can be completed by 5 men in 20 days, how many days will it take for 10 men to complete the same work?

A. 10 days

B. 15 days

C. 20 days

D. 25 days

E. None of the above

Answer: A. 10 days

If 5 men can complete the work in 20 days, then the total work is 5 * 20 = 100 man-days. With 10 men, they will complete the work in 100/10 = 10 days.

Posted in: Time & Work - Aptitude - Mathematics