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Answer:
[tex]A=279\ \text{inch}^2[/tex]
Step-by-step explanation:
Given that,
The inside of a baking pan is to be lined with tinfoil. The pan is 12 inches long, 9 inches wide, and 1.5 inches tall.
We need to find the area of the tinfoil that is needed. It is in the form of cubiod. The area of the cuboid is given by :
[tex]A=2(lb+bh+hl)\\\\A=2(12\times 9+9\times 1.5+1.5\times 12)\\\\A=279\ \text{inch}^2[/tex]
So, [tex]279\ \text{inch}^2[/tex] of tinfoil are needed.