The sales tax rate is 10%.If Rishi bought car and paid sales tax of 2000. What was the cost of car ?

$$\begin{gathered} Let us say the car \cos ts Rs y. \\ That would mean that y multiplied by 10\% is Rs 2000. \\ y(10\%) = 2000 \\ 10\% could also be expressed as 0.10 \\ Thus, y(0.10) = 2000 y =Rs 20000 \\ The car \cos ts Rs 20000 without tax. \end{gathered}$$