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Two pipes A and B can fill an empty tank...

Two pipes A and B can fill an empty tank in 10 hours and 15 hours respectively. Pipe C alone can empty the completely filled tank in 12 hours. First both pipes A and B are opened and after 5 hours pipe C is also opened. What is the total time (in hours) in which the tank will be filled?

A

7

B

5

C

9

D

8

Text Solution

Verified by Experts

The correct Answer is:
A
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