This comment was posted to reddit on Mar 19, 2019 at 9:10 am and was deleted within 16 hour(s) and 31 minutes.

Looking at the large rectangle, the section above the small rectangle has a diagonal with the same slope as the small diagonal. That means the section above the small rectangle is proportional to the small rectangle. Since the base is twice the small rectangle, the height of the section above the small rectangle of the large rectangle is twice the height of the small rectangle, so the height of the section above the small rectangle is 4. This means the total height of the large rectangle is 6.

Area = base * height = 8 * 6 = 48

Alternative answer: The picture is to scale. Divide the large rectangle into two halves vertically, with the same width as the small rectangle. Divide the large rectangle into three thirds horizontally, with the same height as the small rectangle. You have six rectangles, each with about the area of the small rectangle. 6 * 8 = 48. You are allowed to do that on the SAT if it does not say "not to scale".