Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional forces are 10% of energy. How much power is generated by the turbine ? `(g = 10 m/s^2) `

Options

A. 12.3 kW
B. 7.0 kW
C. 8.1 kW
D. 10.2 kW

Answer

C

Explanation

Mass of water falling/second = 15 kg/s.
`h = 60 m, g = 10 m//s^2` , loss = 10% ie., 90% is used
Powre generated = `15 xx 10 xx 60 xx 0.9 = 8100 W = 8.1 kW`.