A alone can do a work in 20 days. A and B together can do the same work in 15 days. B and C together can do the same work in \(\frac{{75}}{2}\) days. What is the ratio of the efficiency of A, B and C in terms of doing the work?

A alone can do a work in 20 days. A and B together can do the same wor

1.	A alone can do a work in 20 days. A and B together can do the same work in 15 days. B and C together can do the same work in \(\frac{{75}}{2}\) days. What is the ratio of the efficiency of A, B and C in terms of doing the work?
A.	5 : 3 : 1
B.	5 : 4 : 3
C.	10 : 4 : 1
D.	15 : 5 : 3
Answer» E.

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A alone can do a work in 20 days. A and B together can do the same work in 15 days. B and C together can do the same work in \(\frac{{75}}{2}\) days. What is the ratio of the efficiency of A, B and C in terms of doing the work?

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