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Average and Instaneous Power

The power of ...

Question

The power of a pump, which can pump 200kg of water to a height of 200m in 10sec is ( $g = 10 m / s^{- 2}$ )

40 kW

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80 kW

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400 kW

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960 kW

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Solution

The correct option is A
40 kW

$P = \frac{m g h}{t} = \frac{200 \times 10 \times 200}{10} = 40 k W$

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