A 20 KVA, 240/120 V, 50 Hz distribution transformer supplies a load of 10 kW at 0.9powerfactor lagging. This transformer is connected as an auto transformer to supply a load

at 240 V. (a) Determine the maximum kVA the auto transformer can supply to the 240 V circuit (b) Determine the efficiency of the auto transformer for full load at 0.9 power factor lagging.