What will be the ratio of simple interest earned by certain amount at the same rate of interest for 25 years and that for 40 years?
Pick
A) 5:8  B) 7:5  C) 3:8  D) Data inadequate  E) None of these
Let the principal be P and rate of interest be R%.   ∴ Required Ratio = [(P×R×25/100) /(P×R×40/100)]=25PR/40PR=25/40=5:8   5:8nswer 5:8
<result>A</result>
What will be the ratio of simple interest earned by certain amount at the same rate of interest for 25 years and that for 40 years?