The banker's gain on a sum due 3 years hence at 12% per annum is Rs. 360. The banker's discount is:  Choose the correct choice.
A) rs . 1360 B) rs . 1000 C) rs . 360 D) rs . 640 E) none of these

Rationale: "explanation : bg = rs . 360 t = 3 years r = 12 % td = ( bg × 100 ) / tr = ( 360 × 100 ) / ( 3 × 12 ) = rs . 1000 bg = bd – td = > bd = bg + td = 360 + 1000 = rs . 1360 answer : option a"
Answer: A