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