A sum of Rs. 12500 amounts to Rs. 16500 in 4 years at the rate of simple interest. What is the rate of interest?	Select.
A) 4% B) 5% C) 6% D) 8% E) 14%
S.I. = (16500 - 12500) = Rs. 4000/-   Rate = (100 * 4000) / (12500 * 4)= 
<gadget id="calculator">(100 * 4000) / (12500 * 4)</gadget>
<output>8</output>
8%   ANSWER:8%
<result>D</result>
A sum of Rs. 12500 amounts to Rs. 16500 in 4 years at the rate of simple interest. What is the rate of interest?