In the given data :
[tex]\text{ The volume of the rectangular box with squre base is V = L}^2H[/tex]
where L is the length and H is the height.
For the 4 foot tall cardoard box,with the square base has length = 2feet
The volume of the carboard is describe as :
[tex]\text{ Volume = L}^2H[/tex]
here we have, length = Square length = 2 feet
Breadth = Height of the cardboard = 4 foot
Substitute the value and simplify:
[tex]\begin{gathered} \text{ Volume = L}^2H \\ \text{ Volume=2}^2\times4 \\ \text{Volume = 4}\times4 \\ \text{Volume =16 f}eet^3 \end{gathered}[/tex]
So, the volume of cardboard is 16 feet³
Answer : Volume of cardboard is 16 feet³