At what rate percent per annum will the simple interest on a sum of money be 2/5 of the amount in 10 years?
Pick
A) 4%  B) 74%  C) 64%  D) 74%  E) 94%
Let sum = x. Then, S.I. = 2x/5, Time = 10 years.   Rate = (100 * 2x) / (x * 5 * 10) = 4%   4%nswer: 4%
<result>A</result>
At what rate percent per annum will the simple interest on a sum of money be 2/5 of the amount in 10 years?