2007 Fermat Problem 16

In the diagram, each of the three squares has a side length of 3. Two of the squares have a common vertex O, and O is the centre of the square labelled ABCD. The perimeter of the entire figure is closest to

\textbf{(A)}\ 21.5\quad \textbf{(B)}\ 22.0\quad \textbf{(C)}\ 22.5\quad \textbf{(D)}\ 24.0\quad \textbf{(E)}\ 30.0

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

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