What will be the ratio of simple interest earned by certain amount at the same rate of interest for 5 years and that for 15 years?
Choose the correct choice from the following answers:
A) 3 : 2 B) 1 : 3 C) 2 : 3 D) 3 : 1 E) 2 : 1
Explanation :   Simple Interest = PRT/100   Here Principal(P) and Rate of Interest (R) are constants   Hence, Simple Interest ∝ T   Required Ratio = Simple Interest for 5 years/Simple Interest for 15 years   =T1/T2   =5/15   =1/3   =1:3   Answer : Option 1 : 3
<result>B</result>
What will be the ratio of simple interest earned by certain amount at the same rate of interest for 5 years and that for 15 years?