If Re.5 amounts to Rs.20 over a period of 3 years. What is the rate of simple interest?  Pick one.
A) 80%  B) 90%  C) 100%  D) 110%  E) 115%
15 = (5*3*R)/100   R = 100%   Answer:100%
<result>C</result>
If Re.5 amounts to Rs.20 over a period of 3 years. What is the rate of simple interest?