In a hydroelectric generating plant there are four similar turbines of total output 220000 kW. Each turbine is 90 percent efficient and runs at 100 rpm under a head of 70 m. it is proposed to test the model of the above turbine in a flume where discharge is 0.5 m3/ under a head of 4 m. Determine the size (scale ratio) of the model. Also calculate the model speed and power results expected from the model