A and B together can do a piece of work in 40 days. A having worked for 20 days, B finishes the remaining work alone in 60 days. In How many days shall B finish the Â whole work alone?

A and B together can do a piece of work in 40 days. A having worked fo

1.	A and B together can do a piece of work in 40 days. A having worked for 20 days, B finishes the remaining work alone in 60 days. In How many days shall B finish the Â whole work alone?
A.	60
B.	70
C.	80
D.	90
Answer» D. 90

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A and B together can do a piece of work in 40 days. A having worked for 20 days, B finishes the remaining work alone in 60 days. In How many days shall B finish the Â whole work alone?

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