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? Choices
A) Rs. 375 B) Rs. 400 C) Rs. 600 D) Rs. 800 E) Rs. 850
C's 1 day's work = 1/3 - (1/6 + 1/8) = 1/3 - 7/24 = 1/24   A's wages : Rs. 400's wages : C's wages = 1/6 : 1/8 : 1/24 = 4: 3 : 1   C's share (for 3 days) = Rs.	(3 * 1/24 * 3200) =Rs.400   Answer = Rs. 400
<result>B</result>
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?