P, Q and R together can complete a work in 36 days. If the ratio of efficiency of P, Q and R is 3 : 2 : 1 respectively, then in how many days R alone can complete the same work?

P, Q and R together can complete a work in 36 days. If the ratio of ef

1.	P, Q and R together can complete a work in 36 days. If the ratio of efficiency of P, Q and R is 3 : 2 : 1 respectively, then in how many days R alone can complete the same work?
A.	108
B.	216
C.	72
D.	144
Answer» C. 72

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P, Q and R together can complete a work in 36 days. If the ratio of efficiency of P, Q and R is 3 : 2 : 1 respectively, then in how many days R alone can complete the same work?

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