Question

What will be the ratio of simple
interest earned by a certain amount at
the same rate of interest for 3 years
and for 9 years?​

Answer 1

Let the principal be P and rate of interest be R %

Therefore,

Required Ratio= (P×R×3/100)/(P×R×9/100)

= 3PR/9PR

= 3/9

= 1/3

= 1:3

Hope it helped...