Answer:
[tex]44\ ft^{2}[/tex]
Step-by-step explanation:
we know that
The surface area of a rectangular prism with the top open is equal to
[tex]SA=B+Ph[/tex]
where
B is the area of the base of the prism
P is the perimeter of the base of the prism
h is the height of the prism
Find the area of the base B
[tex]B=4*2=8\ ft^{2}[/tex]
Find the perimeter P
[tex]B=2*(4+2)=12\ ft[/tex]
we have
[tex]h=3\ ft[/tex]
substitute
[tex]SA=8+(12)(3)=44\ ft^{2}[/tex]