What is the rate percent when the simple interest on Rs.4000 amount to Rs.640 in 2 Years?  Choose the correct choice from the following answers
A) 8.2% B) 8% C) 8.5% D) 9% E) 9.5%
Interest for 1 year = 640/2= 
<gadget id="calculator">640/2</gadget>
<output>320</output>
320   Interest on Rs 4000 p/a= 320   interest rate = 320/4000*100= 
<gadget id="calculator">320/4000*100</gadget>
<output>8</output>
8%   Answer : 8%
<result>B</result>
What is the rate percent when the simple interest on Rs.4000 amount to Rs.640 in 2 Years?