What will be the ratio of simple interest earned by certain amount at the same rate of interest for 6 years and that for 9 years?
Choose the correct choice from the following options.
A) 1 : 3 B) 1 : 4 C) 2 : 3 D) Data inadequate E) None of these
Let the principal be P and rate of interest be R%.   ∴ Required Ratio = [(P×R×6/100) /(P×R×9/100)]=6PR/9PR=69=2:3   Answer 2 : 3
<result>C</result>
What will be the ratio of simple interest earned by certain amount at the same rate of interest for 6 years and that for 9 years?