2020 Cayley Problem 16

In the diagram, the circle has centre O and square OPQR has vertex Q on the circle. If the area of the circle is 72\pi, the area of the square is

\textbf{(A)}\ 38\quad \textbf{(B)}\ 48\quad \textbf{(C)}\ 25\quad \textbf{(D)}\ 12\quad \textbf{(E)}\ 36

If there are no answer choices shown, enter a numerical answer.

Full credit to this problem is given to the CEMC, you may view all Cayley contests here.