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(A) Given that the compound interest $(CI)$ for $2$ years is ₹ $60.60$ and the simple interest $(SI)$ for $2$ years is ₹ $60$.For a period of $2$ year

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(A) Given that the compound interest $(CI)$ for $2$ years is ₹ $60.60$ and the simple interest $(SI)$ for $2$ years is ₹ $60$.For a period of $2$ years,the difference between compound interest and simple interest is given by the formula:$CI - SI = \frac{P 	imes R^2}{100^2}$Alternatively,using the relation $CI - SI = \frac{R 	imes SI}{200}$ for $2$ years:$60.60 - 60 = \frac{R 	imes 60}{200}$$0.60 = \frac{R 	imes 60}{200}$$0.60 = \frac{R 	imes 3}{10}$$R = \frac{0.60 	imes 10}{3}$$R = \frac{6}{3} = 2 \%$Thus,the rate of interest per annum is $2 \%$.

If the compound interest on a certain sum for $2$ years is ₹ $60.60$ and the simple interest is ₹ $60$,then the rate of interest per annum (in $\%$) is

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