A can do a piece of work in 5 hours, B in 9 hours and C in 15 hours. If C could work with them for 1 hour only the time taken by A and B together to complete the work is ?

A can do a piece of work in 5 hours, B in 9 hours and C in 15 hours. I

1.	A can do a piece of work in 5 hours, B in 9 hours and C in 15 hours. If C could work with them for 1 hour only the time taken by A and B together to complete the work is ?
A.	2 hours
B.	3 hours
C.	3
D.	/
E.	4 hours
Answer» B. 3 hours

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A can do a piece of work in 5 hours, B in 9 hours and C in 15 hours. If C could work with them for 1 hour only the time taken by A and B together to complete the work is ?

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