At what rate percent of simple interest will a sum of money double itself in 11 years?	Choose the correct choice from the following answers
A) 9.09 % B) 4.54 % C) 8 . 2 % D) 4.94 % E) 5.54 %

Rationale: "let sum = x . then , s . i . = x . rate = ( 100 * s . i . ) / ( p * t ) = ( 100 * x ) / ( x * 11 ) = 100 / 11 = 9.09 % answer : a"
Answer: A