The bankers discount of a certain sum of money is Rs. 72 and the true discount on the same sum for the same time is Rs. 60. The sum due is: Choose the most appropriate option.
A) rs . 360	B) rs . 432	C) rs . 540	D) rs . 1080	E) rs . 1280

Rationale: "sum = ( b . d * t . d ) / ( b . d - t . d ) ( 72 * 60 ) / 72 - 60 ; 360 answer : a"
Answer: A