The S.I. on a certain sum of money for 5 years at 10% per annum is half the C.I. on Rs. 5000 for 2 years at 12% per annum. The sum placed on S.I. is?	Choose the correct choice from the following answers:
A) 1585
B) 1454
C) 1656
D) 2458
E) 1272

Rationale: c . i . = [ 5000 * ( 1 + 12 / 100 ) 2 - 5000 ] = ( 5000 * 28 / 25 * 28 / 25 - 5000 ) = rs . 1272 . sum = ( 636 * 100 ) / ( 5 * 10 ) = rs . 1272 answer : e
Answer: E