The wall height, d, of the first story is 11 feet. The center height h of the second story has not yet been determined. Find h such that the second story will have the same cross-sectional area as the first story

Answer 1

To find area, you need to know height and width.

Answer 2

Assuming that the building is rectangular in cross-section, so that both stories have the same width, then they will have the same area if they have the same height.