A and B can do a piece of work in 72 days. B and C can do it in 120 days and A and C can do it in 90 days. A alone can do it in:

A and B can do a piece of work in 72 days. B and C can do it in 120 da

1.	A and B can do a piece of work in 72 days. B and C can do it in 120 days and A and C can do it in 90 days. A alone can do it in:
A.	120 days
B.	130 days
C.	150 days
D.	100 days
Answer» B. 130 days

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A and B can do a piece of work in 72 days. B and C can do it in 120 days and A and C can do it in 90 days. A alone can do it in:

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