What will the ratio of simple interest earned by certain amount at the same rate of interest for 3 years and that for 15 years. Choose the correct choice from the following choices.
A) 5:2  B) 1:5  C) 1:2  D) 5:1  E) None of these
Explanation:   Let the principal be P and rate be R   then   ratio = [(P∗R∗3/100) /(P∗R∗15/100)]   =3PR /15PR=1:5   Option 1:5
<result>B</result>
What will the ratio of simple interest earned by certain amount at the same rate of interest for 3 years and that for 15 years.