Latest self Aptitude Question SOLUTION: A leak a tank can empty the tank in 20 hr. The leak is at 3/4th of the hight from the leak to filling pipes there which can fill the tank in 6 hr and 12 hr. If both the pipes are

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(#M40030416) SELF question Keep an EYE

A leak a tank can empty the tank in 20 hr. The leak is at 3/4th of the hight from the leak to filling pipes there which can fill the tank in 6 hr and 12 hr. If both the pipes are opend in how many hr the tank will be filled

SONU GUPTA (10 years ago)

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Mahesh  (10 years ago)

Let the capacity of the tank is 60 litres.
Capacities of filling pipes are 10 and 5 and that of the leaking pipe is 3.

Upto the filling of 3/4 th of the tank, that is upto 45 litres are filled, only the filling pipes are working.
So, to fill the 45 litres, the two pipes will take, 3 hours.
For the last 1/4 of the tank, even the leak is working, so to fill the last 15 litres, the three pipes will take 15/(10+5-3) = 1 hour 15 minutes

So, the total time needed is 4 hours 15 minutes

Answer is 4 hours 15 minutes

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