A 33 kV, 50 Hz, three-phase transmission line is 60 km long. The resistance per phase is 0.2 Ω/km, the inductance per phase is 0.5 mH/km, and the shunt capacitance is negligible. The line is supplying a three-phase load of 12 MVA, 33 kV at 0.8 p.f. lagging. Based on the short line model, determine:
(i) the line-to-line voltage and power at the sending end
(ii) the efficiency of the line.