A and B can do a piece of work in 48 days, A and C can do it in 60 days, b and c can do it 72 days. In what time can c alone do it?

A and B can do a piece of work in 48 days, A and C can do it in 60

1.	A and B can do a piece of work in 48 days, A and C can do it in 60 days, b and c can do it 72 days. In what time can c alone do it?
A.	84 days
B.	84 ½ days
C.	85 days
D.	87 days
Answer» D. 87 days

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A and B can do a piece of work in 48 days, A and C can do it in 60 days, b and c can do it 72 days. In what time can c alone do it?

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