What does Rs. 250 amounts to in 2 years with compound interest at the rate of 4% in the 1st year and 8% in the second year ?

Explanation:-

$$\eqalign{ & {\text{Principal = Rs 250}} \cr & {{\text{R}}_1} = 4\% ,\,\,\,\,\,\,\,\,\,{{\text{R}}_2} = 8\% \cr & {\text{Amount}}\,{\text{after}}{1^{st}}\,{\text{year}} \cr & = 250\left( {1 + \frac{4}{{100}}} \right) = {\text{Rs}}{\text{. }}260 \cr & {\text{Amount after }}{{\text{2}}^{{\text{nd}}}}{\text{ year}} \cr & {\text{ = }}260\left( {1 + \frac{8}{{100}}} \right) \cr & = {\text{Rs}}{\text{. }}280.80 \cr}$$