On a sum of money, the S.I. for 2 years is $660, while the C.I. is $693, the rate of interest being the same in both the cases. The rate of interest is?	Select the correct option:  A) 10%  B) 32%  C) 72%  D) 14%  E) 82%
Difference in C.I. and S.I for 2 years = $693 - $660 = $33   S.I for one year 693 -  660= 
<gadget id="calculator">693 -  660</gadget>
<output>33</output>
$33   S.I for one year= $330   S.I. on $330 for 1 year = $33   Rate = (100 * 33)/(330)= 
<gadget id="calculator">(100 * 33)/(330)</gadget>
<output>10</output>
10%   The answer is 10%.
<result>A</result>
On a sum of money, the S.I. for 2 years is $660, while the C.I. is $693, the rate of interest being the same in both the cases. The rate of interest is?