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A pipe can fill a tank in 15 minutes and...

A pipe can fill a tank in 15 minutes and another one in 10 minutes. A third pipe can empty the tank in 5 minutes. The first two pipes are kept open for 4 minutes in the beginning and then the third pipe is also opened. In what time will the tank be emptied ?

A

35 min

B

15 min

C

20 min

D

Cannot be emptied

Text Solution

Verified by Experts

The correct Answer is:
C
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Knowledge Check

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