A 3-ph., 4-pole, 60Hz induction motor is supplied by a 660-V source. At a particular loading, the total power consumed is 65KW and the current drawn from supply is 70A (assume star connection). The rotor speed is 1760rpm. The stator iron losses are 1.2KW, the windage and friction losses are 1.8KW, and the resistance of stator winding per phase is 0.13 Ω Calculate:
i) Efficiency
ii) Load torque