Calculate the rotor radius for a wind turbine operating at wind speed of 6 m/s to pump water at a
rate of 5 m3/h with a lift of 5 m. Also calculate the angular velocity of the rotor as Water density
ρw=1000 kg/m3, water pump efficiency = 50%, efficiency of rotor to pump = 80%, power
coefficient, Cp = 0.3, tip speed ratio λ = 1.0, air density, ρ = 1.2 kg/m3