A and B can do a piece of work in 12 days, B and C in 15 days, C and A in 20 days. How long would A take separately to do the same work?

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. How long would A take separately to do the same work?
A.	10 days
B.	20 days
C.	30 days
D.	40 days
Answer» D. 40 days

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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. How long would A take separately to do the same work?

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