A motor can pump up water to fill a tank of volume 500m^3 in 25 minutes , which is placed at a height of 20m. If efficiency of the motor is 40%, calculate the power of the motor.
m is the mass of the water pumped by the motor = volume x density
= 500 x 1= 500 kg
W= 500 x 10 x 20 ( g = 10 m/s2
= 100000 joule
Power of the pump
As the efficiency of the motor is 40% this means that the motor will convert only