An outlet pipe can empty a cistern in 3 h. In what time will the pipe empty two-third part of the cistern?

A) 4h

B) 2h

C) 3h

D) 5h

Correct answer:
B) 2h

Description for Correct answer:
Time taken by pipe to empty the cistern = 3 h

Then, time taken by the pipe to empty \( \Large \frac{2}{3} \)part = \( \Large 3 \times \frac{2}{3} \) = 2 h


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