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P, Q and R can complete a work in 30 day...

P, Q and R can complete a work in 30 days, 15 days and 20 days respectively. P works on first day, then Q works on second day and then R works on third day and so on. In how many days the work will be completed?

A

20 days

B

21 days

C

22 days

D

19 days

Text Solution

Verified by Experts

The correct Answer is:
A
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