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It will increase by a factor of 4; in other words, it will be 4 times greater.

Given that all sides of a cube are of equal dimension, I will call this variable dimension x. The surface area is, therefore, x2. If the side of the cube is doubled (2x), then the surface area would be (2x)(2x) = (2x)2 = 4x2.

So:

x --> 2x (the side length is doubled)

x2 --> 4x2 (the surface area is quadrupled)

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