A 480 volt 60 Hz 50 hp three phase induction motor is drawing 60 amps at 0.85

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Question:

A 480 volt 60 Hz 50 hp three phase induction motor is drawing 60 amps at 0.85 lagging power factor. The stator copper losses are 2,000 watts and the rotor copper losses are 700 watts. Friction and windage losses are 600 watts, the core losses are 1,800 watts. Assume all the core losses are occur in the stator and none in the rotor. Determine the air-gap power.