A 4-pole, 3 phase, 400 V, 50 Hz, induction motor has the following parameters for its circuit model (rotor quantities referred to the stator side) on an equivalent-star basis: R =1.6N. X =2.40. R = 0.48N, X = 1.2M and Xm = 40 . Rotational losses are 720 W. Neglect stator copper losses. For a speed of 1470 rpm, calculate the input current, input power factor, net mechanical power output, torque and efficiency. (12)