Question

02
A motor
is marked up
10 kilowatt. It carries
water
20000kg
at 125 meter high
tank in 45 mins. Find out the efficiency of the
motor
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Answer 1

Answer:

Answer

Power of pump=2kW=2000W

Time(t)=60s

Height(h)=10 m

g=10ms

−2

We know,

Power=work done per unit time

Work done=mgh

=m×10×10

=100m

Power=

t

100m

2000=

60s

100m

m=1200 kg

Hence,pump can raise 1200 kg water per minute up to 10 m height