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Pipes A, B and C can fill a tank in 10, ...

Pipes A, B and C can fill a tank in 10, 15 and 30 hours, respectively. D is an emptying pipe which alone can empty the full tank in x hours. A, B and C are opened together for 3 hours and then closed. Now D is opened which alone empties the tank in 30 hours. What is the value of x ?

A

40

B

60

C

50

D

45

Text Solution

Verified by Experts

The correct Answer is:
C
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GAGAN PRATAP -PIPE & CISTERN-MULTIPLE CHOICE QUESTION
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