The sum for 2 years given a compound interest of Rs. 3225 at 15% rate. Then the sum is = ?

Answer: Option A

Interest for 2 years at the rate of 15%
$$\begin{array}{rl}& \text{ = 15 + 15 + }\frac{15\times 15}{100}\\ & =32.25\%\\ & \text{According to question,}\\ & \text{32}\text{.25}\%\text{ = 3225}\\ & \text{100}\%\text{ = }\frac{3225}{32.25}\times 100\\ & =100\times 100=10000\end{array}$$