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Practice Test Discussion
Pipe A usually fills a tank in 2 hours. On account of a leak at the bottom of the tank, it takes pipe A 30 more minutes to fill the tank. How long will the leak take to empty a full tank if pipe A is shut?
Pipe A fills the tank normally in 2 hours So, Pipe A can fill half of the tank in 1 hour Let us consider, the leak takes x hours to empty the full tank when pipe A is shut. So, the leak will empty of the tank in 1 hour. The net amount of water that gets filled in the tank in 1 hour when pipe A and the leak are open of the tank---Eq 1
As per the question, when the leak is open, time taken to fill the tank
Therefore, in 1 hour, th of the tank gets filled--Eq 2