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  • A pump can fill a milk tank in 2 hours. Because of a leakage problem it took 20 minutes more to fill the tank. The plant supervisor wants to find that how much time would the leak take to empty a full tanka) 4 1/3 hours b) 7 hours c) 8 hours d) 14 hours

A pump can fill a milk tank in 2 hours. Because of a leakage problem it took 20 minutes more to fill the tank. The plant supervisor wants to find that how much time would the leak take to empty a full tanka) 4 1/3 hours b) 7 hours c) 8 hours d) 14 hours

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Let the capacity of tank be 'X' litres.
Filling rate of the pump when there is no leak = X / 2  litres/hour

Filling rate of the pump + leak together = X / [ 2 + 1/3 ] = C /(7/3) = 3X/7 litres/hr

Emptying rate of leak = X/2 - 3X/7 = X/14  

Then leak can empty tank in  capacity / leak rate = X / [ X/14 ]  = 14 hours

Posted by

Deependra Verma

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