Question

the power of a motor pump fixed in a well is 3kW. calculate the amount of water raised by the pump per minute at the height of 20m. (g = 10m/ s)


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Answer 1

Power of pump=3kW=3000W

Time(t)=60s

Height(h)=20 m

g=10m/s

We know,Power=work done per unit time

Work done=mgh

=m×10×20

=200m

Power= 200m / t

3000= 200m / 60s

m = 900 kg

Hence,pump can raise 900 kg water per minute up to 20 m height.

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