At what rate percent of simple interest will a sum of money double itself in 11 years? Choose the correct choice from the following options.
A) 9.09 %
B) 4.54 %
C) 8 .2 %
D) 4.94 %
E) 5.54 %
Let sum = x. Then, S.I. = x.   Rate = (100 * S.I.) / (P * T) = (100 * x) / (x * 11)   = 100/11 = 9.09 %   9.09 %NSWER:9.09 %
<result>A</result>
At what rate percent of simple interest will a sum of money double itself in 11 years?