A sum of 15,600 amounts to 21,200 in 5 years at the rate of simple interest. What is the rate of interest?
Choose the correct choice from the following answers.
A) 2%	B) 1%	C) 7%	D) 5%	E) 8%
C   7%   S.I. = (21200 - 15600)= 
<gadget id="calculator">(21200 - 15600)</gadget>
<output>5_600</output>
5600.   Rate= (100 x 5600)/(15600x5)% = 7%
<result>C</result>
A sum of 15,600 amounts to 21,200 in 5 years at the rate of simple interest. What is the rate of interest?