Performance of transmission lines 1

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 A Three phase line 3 km long delivers 3 MW   at 0.8 lagging to a load . The resistance and reactance per kilometer of each conductor are 0.4 Ohm and 0.3 Ohm respectively . if the voltage at the supply end is maintained at 11 KV , calculate  1 . receiving and voltage ( line to line ) , 2 .  line current , 3 . transmission efficiency ? 

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