Receiving current =I=707 A
Sending end voltage =Vs=12174 V
Voltage Regulation=21.75 %

Capacitance to be connected across the load so as to reduce voltage regulation by half of the above voltage regulation is given by :
 C = 87 uF

 Efficiency in : 
Case(i) 	 n=96.2%
Case(ii) 	 n=97.7%