An electric pump on the ground floor of a building taken 15 minutes to fill a tank of volume 30 m^(3) with water. If the tank is 40m above the ground and the efficiency of the pump is 30%, find the electric power consumed by the pump in filling the tank. [density of water = 10^(3) kg//m^(3)]

An electric pump on the ground floor of a building taken 15 minutes to

1.	An electric pump on the ground floor of a building taken 15 minutes to fill a tank of volume 30 m^(3) with water. If the tank is 40m above the ground and the efficiency of the pump is 30%, find the electric power consumed by the pump in filling the tank. [density of water = 10^(3) kg//m^(3)]
Answer» Solution :mass of the water to be filled= (VOLUME of the TANK) `xx` density of water `m= 30 xx 10^(3)kg ` H= 40m, t `=15 xx 60 = 99sec` Efficiency `eta= 30%` Inputpower `p_(i) = (100)/(eta) xx (mgh)/(t)` `=(100 xx 30 xx 10^(3) xx 9.8 xx 40)/(30 xx 900)= 43.56KW`