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A motor pump lifts 6 tonnes of water fro...

A motor pump lifts 6 tonnes of water from a well of depth 25 m to the first floor of height 35 m from the ground floor in 20 minutes. The power of the pump (in kW) is [`g = 10 m s^(-2)`]

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The correct Answer is:
3
Given : m = 6 tonnes = 6000 kg,
h = 25 m + 35 m = 60 m
t = 20 min ` = 20 xx 60 s = 1200 s `
Power ` = ("Work done ")/("time taken ") = (mgh)/(20 xx 60)`
`= (6000 xx 10 xx 60)/(1200) = 3000 W = 3 kW `
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