Answer:
Height = 6h
Width = 11.5h
explaination:
The height of each poster is h, and the width is 8.5 inches more than the height, so the width is 11.5h. The total height of the rectangle is 6h, since there are 6 posters arranged in two rows of three. The total width of the rectangle is 11.5h, since there are 3 posters arranged side by side.