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A cardboard box has a square base and a square top. The height of the box is 13 inches. Express the surface area A (the sum of the areas of all six sides of the box) in terms of the length l of the box.

Can someone please help me

1 answer

top = L^2
bottom = L^2
4 sides = 4*13L

total = 2 L^2 + 52 L

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