If the compound interest on a certain sum of money for 2 years at 10% per annum be Rs. 993, what would be the simple interest? Choose the correct choice from the following choices
A) rs . 600  B) rs . 890  C) rs . 895  D) rs . 900  E) none

Rationale: "let p = principal a - amount we have a = p ( 1 + r / 100 ) 3 and ci = a - p atq 993 = p ( 1 + r / 100 ) 3 - p ? p = 3000 / - now si @ 10 % on 3000 / - for 2 yrs = ( 3000 x 10 x 2 ) / 100 = 600 / - answer : a ."
Answer: A