If A can finish a work in 24 hours and B can finish it in 36 hours, how long will they take to finis

A. 14.4 hours

B. 15 hours

C. 12 hours

D. 18 hours

E. None of the above

Answer: A. 14.4 hours

The combined work rate is 1/24 + 1/36 = 5/72. Therefore, they will complete the work together in 72/5 = 14.4 hours.

Posted in: Time & Work - Aptitude - Mathematics