A can do a piece of work in 30 days. He completed 40% of the work and then left. B completed the remaining work in 21 days. Working together, A and B will complete 65% of the same work in:

A can do a piece of work in 30 days. He completed 40% of the work and

1.	A can do a piece of work in 30 days. He completed 40% of the work and then left. B completed the remaining work in 21 days. Working together, A and B will complete 65% of the same work in:
A.	13 days
B.	\(10\frac{1}{2}\) days
C.	10 days
D.	\(13\frac{1}{2}\) days
Answer» C. 10 days

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A can do a piece of work in 30 days. He completed 40% of the work and then left. B completed the remaining work in 21 days. Working together, A and B will complete 65% of the same work in:

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