Mathematics · Interest
A person lent out a certain sum on simple interest and the same sum on compound interest at a certain rate of interest per annum. If the ratio between the difference of compound interest and simple interest for 2 years and that for 3 years is 20 : 63, then what is the rate of interest per annum?
- 112%
- 210%
- 315%✓
- 49%
Correct answer
15%
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