Question 984218
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A cube has 6 sides, so area of 1 face=1/6 surface area (SA) of cube.
The length of one edge=square root of area of 1 face={{{sqrt((SA)/6)}}}
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For cube with SA=6:
{{{edge=sqrt(6/6)}}}={{{sqrt(1)=1unit}}}
Volume=(edge)^3=(1)^3=1 cubic unit
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For cube with SA=8:
{{{edge=sqrt(8/6)}}}={{{1.15units}}}
Volume=(edge)^3=(1.15)^3=1.54 cubic units
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Size difference depends on whether you are talking edge length or volume.