A and B can do a piece of work in 15 days and C and D can do same piece of work in 18 days. In how many days will A, B, C and D do the same piece of work together?

A and B can do a piece of work in 15 days and C and D can do same piec

1.	A and B can do a piece of work in 15 days and C and D can do same piece of work in 18 days. In how many days will A, B, C and D do the same piece of work together?
A.	90/11 days
B.	45/11 days
C.	135/11 days
D.	60/11 days
Answer» B. 45/11 days

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A and B can do a piece of work in 15 days and C and D can do same piece of work in 18 days. In how many days will A, B, C and D do the same piece of work together?

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