The bankers discount of a certain sum of money is Rs. 288 and the true discount on the same sum for the same time is Rs. 240. The sum due is:
Pick one:
A) 1400
B) 1420
C) 1440
D) 1460
E) 1480

Rationale: "sum = ( b . d * t . d ) / ( b . d - t . d ) ( 288 * 240 ) / 288 - 240 ; 1440 answer : c"
Answer: C