A tank has a leak which would empty it in 10 hours a tap is turned on which admits 4 litre a minute ...........

Quantitative Aptitude ( CCS) Pipes&cistern

A tank has a leak which would empty it in 10 hours,a tap is turned on which admits 4 litre a minute into the tank and now it emptied in 12 hours.The capacity of the tank is:

648 ltr

1440 ltr

1280 ltr

1800 ltr

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Explanation:

Let speed of the bike be x km/hr. Let speed of the electric car be y km/hr
∴ 200/x + 600/y = 10 ∴ 300/x + 500/y = 11
Part filled in 1 hour
= (1/10-1/12) = 1/60
Time taken to fill the tank = 60 hours
Water filled in 60 hours =4*60*60=1440 litres