Answer: The widths of Kyle and Myla's boxes is the same as 2 ft.
Explanation:
Formula : Volume of cuboidal box = length x width x height

Given: Kyle has a storage box that is 2 ft. Long, 3 ft. High, and has a volume of 12 ft³ .

Myla has a storage box that is 4 ft. High, 2 ft. Long, and has a volume of 16 ft³.

Hence, the widths of Kyle and Myla's boxes is the same as 2 ft.