# Simple Interest - 04

## 03. A sum of money at a certain rate per annum of simple interest doubles in the 5 years and at a different rate becomes three times in 12 years. The lower rate of interest per annum is = ?

• 115%
• 220%
• 3
$\text{15}\frac{3}{4}$
%
• 4
$16\frac{2}{3}$
%

## 08. Simple interest on Rs. 500 for 4 years at 6.25% per annum is equal to the simple interest on Rs. 400 at 5% per annum for a certain period of time. The period of time is = ?

• 14 years
• 25 years
• 3
$6\frac{1}{4}$
years
• 4
$8\frac{2}{3}$
years
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