IBPS PO (Probationary Officer) [ibps]

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Pipe A can fill a cistern in 12 hours and Pipe B can fill it in 15 hours. Both pipes are opened together, but after 3 hours, Pipe A is turned off. How much more time will Pipe B alone take to fill the remaining part of the cistern?

8 hours 8 hours 15 minutes 7 hours 45 minutes 9 hours

Correct Answer:

8 hours 15 minutes

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