Question

A pump is used to raise water to a height of 20m.it transfers 2000kg of water in 15min.calculate power of the pump.(g=10m/s)

Answer 1

H=20m
M=2000 kg
T=15 mins-900 sec
P=w/t
=mgh/t
=2000*10*20/900
=444.4 w

Answer 2

Hi Bhoomika !!

We know that power is calculated as work done divided by the time taken to do the work .

Here work done = force x displacement
= Mg x h (as f= weight of the pump =Mg)
=(2000 x 10 x20) Nm

Time taken =15 min =(15x60)secs =900secs

So Power of the pump is =
(2000 x10 x20)/900 W
=444.4W

Hope that helps !