P, Q and R together can complete a work in 20 days. P alone can complete the work in 40 days, Q alone in 60 days then in how many days R alone can complete the work?

P, Q and R together can complete a work in 20 days. P alone can comple

1.	P, Q and R together can complete a work in 20 days. P alone can complete the work in 40 days, Q alone in 60 days then in how many days R alone can complete the work?
A.	60
B.	80
C.	40
D.	120
Answer» E.

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P, Q and R together can complete a work in 20 days. P alone can complete the work in 40 days, Q alone in 60 days then in how many days R alone can complete the work?

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