The value of a property depreciates every year by 10% of its value at the beginning of the year. The present value of the property is Rs. 8100. What was its value 2 years ago ?

Answer: Option A

10% = $$\frac{1}{10}$$
$$\begin{array}{c}\text{Initial }\text{Final}\text{hfill}\\ \text{10}9\text{hfill}\\ 109\text{hfill}\\ \overline{10081}\text{hfill}\end{array}$$
⇒ 81 units = Rs. 8100
⇒ 1 unit = Rs. 100
⇒ 100 units = Rs. 10000
⇒ Value of property 2 years ago
⇒ Rs. 10000