First slide

Power

Question

The power of pump, which can pump 200 kg of water to a height of 50 m in 10 sec, will be

Moderate

A

$10 \times 10^{3} watt$
B

$20 \times 10^{3} watt$
C

$4 \times 10^{3} watt$
D

$60 \times 10^{3} watt$

Solution

$P = \frac{W}{t} = \frac{mgh}{t} = \frac{200 \times 10 \times 50}{10} = 10 \times 10^{3} W$

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