Experts explain the answer of 50th question clearly

Dear Student,

total resistance of two wire lines, R=2×20×0.4=16 ohmSince power supply is through 3000-200 V transformer,Vrms=3000 VP=IrmsVrms600×103=3000IrmsIrms=200 AVoltage drop on the line, V=IrmsRV=200×16=3200 voltVoltage from transmission=3000+3200=6200 V
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