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An open box with a square base...

An open box with a square base is required to have a volume of 27 cubic feet. Express the amount A of material that is needed to make such a box as a function of the length x of a side of the square base. I have A(27/x^2) +x^3....i have no clue to if this is correct.

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Assume that the length x of a side of the square base. Assume that the height is y. Then the volume is
V=x^2*y
Given V=27, so
x^2*y=27 ...

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