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P can do a piece of work in 20 days and ...

P can do a piece of work in 20 days and Q can do the same piece of work in 60 days. They start working together and work for 5 days and then both leave the work. R alone finishes the remaining work in 10 days. In how many days will R alone finish the whole work?

A

10

B

16

C

15

D

20

Text Solution

Verified by Experts

The correct Answer is:
C
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