The volume of a cube is the side length cubed,
[tex]v = {s}^{3} [/tex]
Simply plug in the volume,
[tex]27000 = {?}^{3} [/tex]
( Note : the question mark represents the side length (s) )
[tex]s = 30[/tex]
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I hope that helps you out!!
Any more questions, please feel free to ask me and I will gladly help you out!!
~Zoey