A completes a work in 15 days. B complete the same work in 20 days. A started working alone after 1 days B joined him. How many day will they now take together to complete the remaining work ?

A completes a work in 15 days. B complete the same work in 20 days. A

1.	A completes a work in 15 days. B complete the same work in 20 days. A started working alone after 1 days B joined him. How many day will they now take together to complete the remaining work ?
A.	8 days
B.	7 days
C.	6 days
D.	None of these
Answer» B. 7 days

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