The figure is made up of a square and a rectangle.<br><br>&bull; PW spans from P to W, going across the width of the rectangle and the side of the square.<br>&bull; From the figure, the rectangle's width and the square's side add up to the total PW.<br>&emsp; PW = 20 cm (as labelled in the figure).<br><br>Final Answer: PW = 20 cm