What will be the ratio of simple interest earned by certain amount at the same rate of interest for 6 years and that for 9 years?

Question: What will be the ratio of simple interest earned by certain amount at the same rate of interest for 6 years and that for 9 years?
[A].

1 : 3

[B].

1 : 4

[C].

2 : 3

[D].

Data inadequate

Answer: Option C

Explanation:

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

Required ratio =	P x R x 6 100	=	6PR	=	6	= 2 : 3.
	P x R x 9 100		9PR		9

Video Explanation: https://youtu.be/GaaEDwTWc6w