A pump is delivering water through a pipe of cross sectional area 10cm2 . If water flows through the pipe with a velocity 4m/s, power output of the pump is
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a
46 W
b
32 W
c
64 W
d
84 W
answer is B.
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Detailed Solution
m= Rate of mass flow=ρAV∴Power output of the pump is =12mv2=12ρAV3=12×103×10×10−4×W=32 Watt.