A can do a work in 72 days and B in 90 days. If they work on it together for 10 days, then what fraction of work is left?

A can do a work in 72 days and B in 90 days. If they work on it togeth

1.	A can do a work in 72 days and B in 90 days. If they work on it together for 10 days, then what fraction of work is left?
A.	3/4
B.	1/4
C.	4/5
D.	5/6
Answer» B. 1/4

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A can do a work in 72 days and B in 90 days. If they work on it together for 10 days, then what fraction of work is left?

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