Q.

Power of a water pump is 2 kW.  If g=10 m/sec2, the amount of water it can raise in one minute to a height of 10 m is (in litre)

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answer is 1200.

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Detailed Solution

P=mght  ⇒m=p×tgh=2×103×6010×10=1200kgAs volume = massdensity⇒v=1200kg103kg​/​m3=1.2m3  Volume =  1.2m3=1.2×103litre=1200 litre
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Power of a water pump is 2 kW.  If g=10 m/sec2, the amount of water it can raise in one minute to a height of 10 m is (in litre)