Question

Water falls from a height of $80\text{m}$at the rate of $20\text{kg/s}$ to operate a turbine. The losses due to frictional forces are $15\%$ of energy. Power generated by the turbine is

• A. $13.6\text{kW}$
• B. $27\text{kW}$
• C. $68\text{kW}$
• D. $8.27\text{kW}$

Answer 1

The correct option is A $13.6\text{kW}$

Answer (3)
Power generated by turbine = $85\%$ of power of falling water
$P=\frac{85}{100}\times \frac{dm}{dt}\times g\times h$
$=\frac{85}{100}\times 20\times 10\times 80$
$=13600\text{W}$
$=13.6\text{kW}$