A engine pumps up 100 kg of water trough a height of 10 m in 5s. Given that efficiency of engine is 60%. If $g = 10 m s^{- 2}$ , the power of this engine is

3.3 kW

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0.22 kW

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0.033 kW

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33 kW

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Solution

The correct option is C 3.3 kW
Power given to the water is $= 100 \times 10 \times 10 / 5 = 2000 W$
Power of the engine $= 2000 \times 100 / 60 = 3.3 k W$

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