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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?

1 : 3
1 : 4
2 : 3
Data inadequate
None of these

Correct Answer: 2 : 3

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

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