Question

The surface area for a rectangular prism with a square base is SA=2s2+4sh . What is the surface area if s=3 and h=5 ?

Answer 1

so you subtitute and get SA=2(2)2+4(2)(4) and get SA=8+32=40

actually the surface area is 2(s^2)+4sh and if you subitute you get the same thing

Answer 2

Given that SA=2s² + 4sh

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Plug in s=3 and h=5:

SA = 2(3)² + 4 (3) (5) = 18 + 60 = 78 units²

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Answer: SA = 78 units²