Multiple Choice Questions

A tank can be filled in 10 minutes but there is a leakage in it which can empty the full tank ...........

Quantitative Aptitude (CDS) Time and work

A tank can be filled in 10 minutes but there is a leakage in it which can empty the full tank in 20 minutes. In how many minutes it can be filled?

20minutes

25minutes

30minutes

31minutes

Filling efficiency = 10% (100/10)
Emptying efficiency = 5%
Net efficiency = 10-5 = 5%
Required time to fill the tank = 100/5 = 20minute

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