A and B can do a piece of work in 12 days, C and A in 20 days and B and C in 15 days, then in how many days will they finish it working together?

A and B can do a piece of work in 12 days, C and A in 20 days and B an

1.	A and B can do a piece of work in 12 days, C and A in 20 days and B and C in 15 days, then in how many days will they finish it working together?
A.	15 days
B.	5 days
C.	20 days
D.	10 days
Answer» E.

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A and B can do a piece of work in 12 days, C and A in 20 days and B and C in 15 days, then in how many days will they finish it working together?

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