A square storage unit has a volume of 607.5 ft3. The height of the unit is 7.5 ft. What are the length and width of the storage unit?

For a square storage unit, the length and width are equal. Divide the volume by the height to find the floor area: 607.5 ÷ 7.5 = 81 square feet. The square root of 81 is 9, so the length and width are both 9 ft. Choice D gives a length of 9 ft and a width of 9 ft.

AI-written and checked against the verified answer.