In a right angled trianlge $\Delta ABC$ $\angle ABC = x$ and $\angle BCA = \frac{x}{2}$. What is the value of $x$ ?

Question

$\begin{array}{1 1} (a)\; 30^{\circ} \\ (b)\; 45^{\circ} \\ (c)\; 60^{\circ} \\ (d)\; 50^{\circ} \end{array}$