Given a rectangular prism as shown
Surface Area = ph + 2B
[tex]\begin{gathered} \text{perimeter = (10 + 10 + 4 + 4)ft} \\ P\text{ = 28ft} \\ \text{Height = 4ft} \end{gathered}[/tex][tex]\begin{gathered} \text{Base area = 10ft x 4ft} \\ \text{Base area }=\text{ 40ft} \end{gathered}[/tex][tex]\begin{gathered} Surface\text{ Area = 28ft x 4ft + 2 (40ft)} \\ Surface\text{ Area = 112ft + 80ft} \\ SurfaceArea=192ft^2 \end{gathered}[/tex]
Hence the surface area = 192ft²
