A sum of Rs. 12500 amounts to Rs. 15000 in 4 years at the rate of simple interest. What is the rate of interest? Pick:  A) 4%  B) 5%  C) 6%  D) 8%  E) 14%
S.I. = (15000 - 12500) = Rs. 2500/-   Rate = (100 * 2500) / (12500 * 4)= 
<gadget id="calculator">(100 * 2500) / (12500 * 4)</gadget>
<output>5</output>
5%   ANSWER:5%
<result>B</result>
A sum of Rs. 12500 amounts to Rs. 15000 in 4 years at the rate of simple interest. What is the rate of interest?