10) The ratio of velocity of two objects A and B is 1 : 3. If the position - time graph of object A is inclined to time axis at 30$°$, then the position - time graph of object B is inclined to time axis at.
$$\begin{gathered} \left(1\right) 0° \\ \left(2\right) 90° \\ \left(3\right) 30° \\ \left(4\right) 60° \end{gathered}$$