A sum of 13,400 amounts to 14,400 in 2 years at the rate of simple interest. What is the rate of interest? Choose the correct option
A) 2%
B) 1%
C) 6%
D) 4%
E) 8%
D   4%   S.I. = (14400 - 13400)= 
<gadget id="calculator">(14400 - 13400)</gadget>
<output>1_000</output>
1000.   Rate= (100 x 1000)/(13400x2)% = 4%
<result>D</result>
A sum of 13,400 amounts to 14,400 in 2 years at the rate of simple interest. What is the rate of interest?