A and B can do a piece of work in 72 days. B and C can do it in 120 days. A and C can do it in 90 days. In how many days all three together can do the work ?

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. A and C can do it in 90 days. In how many days all three together can do the work ?
A.	80 days
B.	100 days
C.	60 days
D.	150 days
Answer» D. 150 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. A and C can do it in 90 days. In how many days all three together can do the work ?

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