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UPSC 2014 CDS II Math Paper

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Question : 1

Total: 100

Pipe A can fill a tank in 3 hours. But there is a leakage also, due to which it takes 3-5 hours for the tank to be filled, How much time will the leakage take in emptying the tank if the tank is filled initially?

21 hours
20 hours
18 hours
10.5 hours

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