SOLUTION: the total surface area of a cube is 54.how long is its edge

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Question 811316: the total surface area of a cube is 54.how long is its edge
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +e+ = length of it's edge
+e%5E2+ = surface area of one side
+6%2Ae%5E2+ = surface area of the cube
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+54+=+6%2Ae%5E2+
+e%5E2+=+9+
+e+=+3+
The edge is 3 units long