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Aptitude Day 249

Answers of Day 248:  1. 140 minutes.
                                        2.  2 hours.

Problems to solve on Pipes and cisterns:

1. Pipes A and B can fill a tank in 10 and 15 minutes respectively. Both the pipes are opened together but after 2 minutes, pipe A is turned off. What’s the total time required to fill the tank?


2. A pump can fill a tank in an hour. Because of the leak, it took 1(1/2) hours to fill the tank. The leak can drain all the water of the tank in:

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