Aptitude Time and Work Exercise 2

A can lay railway track between two given stations in 16 days and B can do the same job in 12 days. With help of C, they did the job in 4 days only. Then, C alone can do the job in:

View Answer

C.

solution

A and B can do a job together in 7 days. A is  times as efficient as B. The same job can be done by A alone in :

Aptitude Time and Work Exercise 2