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Question

A one kilowatt motor pumps out water from a 10 m deep well. Calculate the quantity of water pumped out per second.(Take g=10 m/s2)

A
10 kg
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B
8.96 kg
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C
14.3 kg
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D
9.8 kg
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Solution

The correct option is A 10 kg
Given
Power =1 kilowatt =103 watt
S=10 m, time =1 s, g=10 m/s2, Required mass of water =m kg

Power=work donet

Power=mgSt
putting values (from given data)

103=m×10×101
Required mass =10 kg

hence option A is the correct answer

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