What is the average power output of an electric motor driving a pump for lifting 200 kg of water at a height of 100 m in 1 minute? Efficiency of pump is 75%

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3.25 kW

7.84 kW

6.45 kW

4.44 kW

answer is D.

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Detailed Solution

Power output of the pump =200×100×1060 W∴ Power input to the pump =200×100×1060×0.75 watt =4.44 kW∴ Power output of the motor = 4.44 kW.

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