A $100$ KM long $3-0,50$ Hz transmission line has the following line constant. Resistance$/$phase$/$KM$-0\mathrm{.}12,$ Reactance$/$phase$/$KM$-0\mathrm{.}52,$ Susceptance$/$phase$/$KM$-10$x$10$ S$.$ If the line supplies load of $20$ MW at $0\mathrm{.}9$ P$.$F lagging at $66$KV at the receiving end, calculate by

nominal $-$ method $10$ Sending Und Power factor ii$)$ Sending end Voltage $($ii$)$ Sending end current

iv$)$ Transmission Efficiency and Voltage Regulation.

$15$x$31$