Any height below the ground level is usually considered to be negative while any one above the ground level is usually considered to be positive.
Depth of first level of parking garage = 21.4 ft
- We are told that the ground level is 0 ft.
- Secondly, there are 7 floors which are all same height.
- Since the height of the seventh floor level from the parking garage level is −149.8 ft, then height of each floor is;
149.8/7 = 21.4 ft
- The negative sign is not included because it only depicts that it is below ground level but we are looking for actual value of height and so it has to be positive.
Height of each floor = 21.4 ft
This will also be the same depth of the first floor.
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