A and B can do a piece of work in 12 days; B and C in 15 days; C and A in 20 days. In how many days can A alone do it?

A and B can do a piece of work in 12 days; B and C in 15 days; C and A

1.	A and B can do a piece of work in 12 days; B and C in 15 days; C and A in 20 days. In how many days can A alone do it?
A.	\(15\frac{2}{3}\)
B.	24
C.	30
D.	40
Answer» D. 40

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A and B can do a piece of work in 12 days; B and C in 15 days; C and A in 20 days. In how many days can A alone do it?

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