Discussion Forum
Que.  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: 
a.  9(1/5)days 
b.  9(2/5)days 
c.  9(3/5)days 
d.  10 
Correct Answer:9(3/5)days
