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7 February, 11:45

A rectangular prism has dimensions 8 inches by 2 inches by 32 inches. if a cube has the same volume as the prism, what is the surface area of the cube, in square inches?

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  1. 7 February, 13:05
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    The formula for volume of a rectangular prism is V = l * w * h, but a cube is

    V = a³

    We know the volume of the cube because it is the same as the prism, and we know the prism because of V = l * w * h.

    V = 8 * 2 * 32 ... V = 512

    So the cube's volume is 512 as well

    So ... 512 = a³

    ∛512 = a

    a = 8

    a is one side of the cube, a² is one face. A cube has 6 faces similar to a die with six numbers. So 6 * a² is the surface area. 384 is your answer.
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