Acube with a side length of 6 mm has a surface area to volume ratio of

The surface area (SA) of a cube, which has 6 faces, is the 6 times the area of one face, length×length, or:

And the volume (V) of a cube is the length times width times depth, which are all the same (length×length×length), or:

Therefore the SA/V ratio is:

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