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A lift pump of power 2000 W pumps water to an averageheight of 15 m to fill a tank 3 mx2 mx 1 m. The efficiencyof the pump is 75%. What is the time required to fill thetank ? Given :g 10ms2 [BCETI IAns. 10 minutelclas un a hill whose slone is 1 in 25, at 6kmm

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