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Two pipes P and Q can fill an empty tank...

Two pipes P and Q can fill an empty tank in 20 minutes and 10 minutes respectively. R can empty a full tank in 15 minutes. If all three pipes are opened together, how much time (in minutes) will they take to fill the tank?

A

12

B

18

C

10

D

15

Text Solution

Verified by Experts

The correct Answer is:
A
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