Practice Test Discussion


A pump can fill a tank with water in 2 h. Because of a leak in the tank, it takes 213 h to fill the tank. The leak can empty the filled tank in___

[SSC CPO 2006, CGL 2002]

  • Explanation

    According to the question,

    part of the tank filled by pump in 1 hour=12

    Because of the leak, part of the tank emptied by pump in 1 hour=1213=173=37

    part of the tank emptied by the leak in 1 hour=12-37=7-614=114

    The tank will be emptied in 14 hours.

    Hence option D is correct.

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