At what rate percent per annum will the simple interest on a sum of money be 7/5 of the amount in 10 years?
Answers:
A) 4%
B) 7%
C) 9%
D) 3%
E) 14%
Let sum = x. Then, S.I. = 7x/5, Time   = 10 years.   Rate = (100 * 7x) / (x * 5 * 10)   = 14%   Answer: 14%
<result>E</result>
At what rate percent per annum will the simple interest on a sum of money be 7/5 of the amount in 10 years?