At what rate percent per annum will the simple interest on a sum of money be 3/5 of the amount in 10 years?  Choose the most appropriate option
A) 6%	B) 7%	C) 9%	D) 3%	E) 1%
Let sum = x. Then, S.I. = 2x/5, Time   = 10 years.   Rate = (100 * 3x) / (x * 5 * 10)   = 6%   6%nswer: 6%
<result>A</result>
At what rate percent per annum will the simple interest on a sum of money be 3/5 of the amount in 10 years?