If the power of the motor of a water pump is 3kW, then the volume of water that can be lifted to a height of 10m in one minute by the pump is (g=10m/s2) :
A
1800liters
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B
180liters
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C
18,000liters
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D
18liters
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Solution
The correct option is A1800liters P=WorkDonet P=mght P=ρVght
where ρ is density and V is volume of water 3×103=103×V×10×1060 ⇒v=1.8m3=1800liters