Discussion Forum
Que.  A alone can do a piece of work in 6 days and B alone in 8 days. A and B undertook to do it for Rs. 3200. With the help of C, they completed the work in 3 days. How much is to be paid to C? 
a.  Rs. 375 
b.  Rs. 400 
c.  Rs. 600 
d.  Rs. 800 
Correct Answer:Rs. 400
