Correct answer: option C − 8.1 kW
Solution:
The mass of the water falling/second, m = 15 kg/s
The height of the water fall, h = 60 m
Energy loss is 10%, therefore 90% of the water's energy can be used by the turbine to generate power.
The power generated = 90100×mgh
= 0.9×15×10×60=8100 W=8.1 kW