The true discount on a bill of Rs.8640 is Rs.1440.The banker's discount is  Select
A) 1428
B) 1528
C) 1628
D) 1728
E) None of these
Solution   P.W	= Rs.(8640 - 1440)   = Rs. 720   S.I on Rs. 8640	=Rs.(1440/7200 x 8640)   = Rs. 1728.   Answer 1728
<result>D</result>
The true discount on a bill of Rs.8640 is Rs.1440.The banker's discount is