Answer:
The surface area is 78 unit square.
Step-by-step explanation:
Given : The surface area for a rectangular prism with a square base is [tex]SA=2s^2+4sh[/tex].
To find : What is the surface area if s=3 and h=5?
Solution :
The surface area for a rectangular prism with a square base is [tex]SA=2s^2+4sh[/tex]
Substitute, s=3 and h=5
[tex]SA=2(3)^2+4(3)(5)[/tex]
[tex]SA=2\times 9+4\times 15[/tex]
[tex]SA=18+60[/tex]
[tex]SA=78[/tex]
Therefore, The surface area is 78 unit square.
