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Q.

An engine pumps up 100 kg of water through a height of 10 m in 5 s. Given that, the efficiency of engine is 60%. If g = 10 ms-2, the power of this engine is :

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a

3.3 kw

b

0.33 kW

c

0.033 kw

d

33 kw

answer is A.

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Detailed Solution

Power of engine =mght=(100)(10)(10)5×0.6≈3300W≈3.3kW

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An engine pumps up 100 kg of water through a height of 10 m in 5 s. Given that, the efficiency of engine is 60%. If g = 10 ms-2, the power of this engine is :