What will the ratio of simple interest earned by certain amount at the same rate of interest for 6 years and that for 9 years.	Choose one.
A) 1:2	B) 2:1	C) 2:2	D) 2:3	E) None of these
Explanation:   Let the principal be P and rate be R   then   ratio = [(P∗R∗6/100) /(P∗R∗9/100)]   =6PR /9PR=2:3   Option 2:3
<result>D</result>
What will the ratio of simple interest earned by certain amount at the same rate of interest for 6 years and that for 9 years.