An electric water pump rate 1.5 kW, lifts 200kg of water ...
An electric water pump rate 1.5 kW, lifts 200kg of water through a vertical height of 6 meters in 10 seconds. What is the efficiency of the pump? [g = 10ms-2, neglecting air resistance]
90.0%
85.0%
80.0%
65.0%
Correct answer is C
Efficiency = output x 100
= 200×10×6101500 x 1001
= 80%