A can do a piece of work in 40 days. He works on it for 5 days and then B alone finishes the remaining work in 21 days. Working together, A and B could have completed the work in:

A can do a piece of work in 40 days. He works on it for 5 days and the

1.	A can do a piece of work in 40 days. He works on it for 5 days and then B alone finishes the remaining work in 21 days. Working together, A and B could have completed the work in:
A.	12 days
B.	15 days
C.	18 days
D.	24 days
Answer» C. 18 days

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A can do a piece of work in 40 days. He works on it for 5 days and then B alone finishes the remaining work in 21 days. Working together, A and B could have completed the work in:

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