What is the rate percent when the simple interest on Rs.2000 amount to Rs.320 in 4 Years? Choose the correct choice from the following.
A) 4.5%	B) 4.25%	C) 4%	D) 4.3%	E) 4.1%
Interest for 1 year = 320/4= 
<gadget id="calculator">320/4</gadget>
<output>80</output>
80   Interest on Rs 2000 p/a= 80   interest rate = 80/2000*100= 
<gadget id="calculator">80/2000*100</gadget>
<output>4</output>
4%   Answer : 4%
<result>C</result>
What is the rate percent when the simple interest on Rs.2000 amount to Rs.320 in 4 Years?