Question 82

A pipe can fill an empty tank in 15 hours. Due to a leak at the bottom, the tank is filled in 20 hours. If the tank is full, then in how much time (in hours) will the leak take to empty the tank ?

Solution

Pipe can fill in 15 hr

Pipe along with Leak hole take 20 hr

So lcm of both 60

hence efficiency of pipe is 60/15= 4

Efficiency of both is 60/20= 3

So efficiency of leak is 4-3=1 so the leak hole take 60/1 = 60 hr to leak out all water.

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