what is rate of interest if principal.amount be 400,simple interest 140 and time 2year. Choose the correct option.
A) 10
B) 17.5
C) 25
D) 12
E) 14.5
s.i=(p*r*t)/100   140=800r/100   r=140/8= 
<gadget id="calculator">140/8</gadget>
<output>35/2 = around 17.5</output>
17.5%   answer 17.5
<result>B</result>
what is rate of interest if principal.amount be 400,simple interest 140 and time 2year.