RRB Paramedical Staff Nurse Model Paper 3

Question : 46 of 100

Marks: +1, -0

A pump can fill a tank with water in 2h. Because of a leak in the tank, it takes 7/3 h to fill the tank. The leak can empty the filled tank in

Solution:

According to the question,
Part of the tank filled by the pump in

1{h}=\;{1}/{2}

Because of the leak, part of the tank filled by the pump in

1 {h}=\;{3}/{7}

Thus, part of the tank emptied by the leak in

1{h}=\;{1}/{2}-\;{3}/{7}

=\;{7-6}/{14}=\;{1}/{14}

Hence, the leak will empty the tank in

14 {h}

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