The difference between the simple interest received from two different sources on Rs.1800 for 3 years is Rs.13.50. The difference between their rates of interest is  Choose the correct choice from the following:
A) 0.15% B) 0.25% C) 0.35% D) 0.45% E) 0.55%
(1800xR1x3)/100-(100xR2x3)/100 =13.50   5400(R1-R2)=1350   R1-R2 = 1350/5400= 
<gadget id="calculator">1350/5400</gadget>
<output>1/4 = around 0.25</output>
0.25%   answer : 0.25%
<result>B</result>
The difference between the simple interest received from two different sources on Rs.1800 for 3 years is Rs.13.50. The difference between their rates of interest is