Question 1122146
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The side of cube A  is  {{{root(3,216)}}} = 6 inches.


The side of cube B  is  6+2 = 8 inches.


The volume of cube B  is  {{{8^3}}} = 812 cubic inches.


I leave it to you to calculate the difference.
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&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Happy calculations !