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]
-
A.
90.0% -
B.
85.0% -
C.
80.0% -
D.
65.0%
Correct Answer: Option C
Explanation
Efficiency = output x 100
= (frac{frac{200 {times} 10 {times} {6}}{10}}{1500}) x (frac{100}{1})
= 80%