At what rate percent of simple interest will a sum of money double itself in 33 years? Choose the most appropriate option
A) 6.54 %
B) 4.54 %
C) 8 .2 %
D) 3.03 %
E) 5.54 %
Let sum = x. Then, S.I. = x.   Rate = (100 * S.I.) / (P * T) = (100 * x) / (x * 33)   = 100/33 = 3.03 %   ANSWER:3.03 %
<result>D</result>
At what rate percent of simple interest will a sum of money double itself in 33 years?