What will the ratio of simple interest earned by certain amount at the same rate of interest for 4 years and that for 12 years.  Choose the correct choice
A) 2:3	B) 2:5	C) 1:3	D) 2:3	E) None of these
Explanation:   Let the principal be P and rate be R   then   ratio = [(P∗R∗4/100) /(P∗R∗12/100)]   =4PR /12PR=1:3   Option 1:3
<result>C</result>
What will the ratio of simple interest earned by certain amount at the same rate of interest for 4 years and that for 12 years.