The given information is:
- Rate of depreciation 10%
- Price of the machine $18000
- It was sold after 3 years
We have to find what price it will fetch.
The value of the machine after 3 years is given by the following formula:
[tex]Q=P(1-\frac{r}{100})^n[/tex]Where P is the present value, r is the depreciation rate and n the number of years, so:
[tex]\begin{gathered} Q=18000(1-\frac{10}{100})^3 \\ Q=18000(1-0.1)^3 \\ Q=18000(0.9)^3 \\ Q=18000(0.729) \\ Q=13122 \end{gathered}[/tex]Thus, the machine will fetch 13122 after 3 years.
The answer is a. $13122