To find the surface area of a rectangular prism you use the next formula:
[tex]SA=2lw+2wh+2lh[/tex]
l is length
w is width
h is height
For the given prism:
l=5yd
w=4yd
h=8yd
[tex]\begin{gathered} SA=2(5yd)(4yd)+2(4yd)(8yd)+2(5yd)(8yd) \\ SA=40yd^2+64yd^2+80yd^2 \\ SA=184yd^2 \end{gathered}[/tex]
The surface area of the given rectangular prism is 184 square yards
