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A cistern has two taps which fill it in ...

A cistern has two taps which fill it in 12 minutes and 15 mintues respectively . There is also a waste pipe in the cistern. When all the pipes are opened , the empty cistern is filled in 20 mintues. How long will the waste pipe take to empty a full cistern ?

A

8 min.

B

10 min.

C

12 min.

D

16 min.

Text Solution

Verified by Experts

The correct Answer is:
B
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UPKAR PUBLICATION -PIPES AND CISTERNS-QUESTION BANK
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