Two filling taps P and Q together can fill a tank with rate of 40 lit min and 60 lit min respectivel...........

Quant (SSC) Pipes&cistern

Two filling taps P and Q together can fill a tank with rate of 40 lit/min and 60 lit/min respectively in 8 min. If a waste tap can empty the filled tank in 32 min, then what is the rate of waste tap ?

34 lit/min

25 lit/min

22 lit/min

18 lit/min

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Explanation:

Given that the waste tap can empty the filled tank in 32 min.
Now, the rate at which the waste tap can empty the tank = (40 + 60)8/32 = 100/4 = 25 lit/min.