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. 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 and A and C can do it in 90 days. In how many days all three together can do the work ?
A.	0 days
B.	00 days
C.	0 days
D.	50 days
Answer» D. 50 days