XAT 2019 Trigonometry — Previous Year Question

The figure below shows two right angled triangles $\triangle OAB$ and $\triangle OQP$ with right angles at vertex $A$ and $P$, respectively, having the common vertex $O$. The lengths of some of the sides are indicated in the figure. (Note that the figure is not drawn to scale.) $AB$ and $OP$ are parallel. What is $\angle QOB$?