A model of Francis turbine that is one-fifth of full size develops 3 kW at 320 rpm under a head of 1.5 m. Determine the speed and power of full size turbine operating under a head of 5 m if (i)...

A model of Francis turbine that is one-fifth of full size develops 3 kW at 320 rpm under a head of 1.5 m. Determine the speed and power of full size turbine operating under a head of 5 m if (i) efficiency of the model and the full size turbine are same and (ii) efficiency of the model turbine is 75% and the scale effect is considered.