P and R can do a piece of work in 30 days, P and Q can do it in 45 days while Q and R can finish it in 60 days. In how many days can R alone finish the work?

P and R can do a piece of work in 30 days, P and Q can do it in 45 day

1.	P and R can do a piece of work in 30 days, P and Q can do it in 45 days while Q and R can finish it in 60 days. In how many days can R alone finish the work?
A.	45 days
B.	48 days
C.	64 days
D.	72 days
Answer» E.

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P and R can do a piece of work in 30 days, P and Q can do it in 45 days while Q and R can finish it in 60 days. In how many days can R alone finish the work?

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