SOLUTION: If a cube has a total surface area of 486 square feet, then it is ??? feet on each edge.

Algebra ->  Volume -> SOLUTION: If a cube has a total surface area of 486 square feet, then it is ??? feet on each edge.       Log On


   

Question 249963: If a cube has a total surface area of 486 square feet, then it is ??? feet on each edge.
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
A square has 6 equal square surfaces.
6x^2=486
x^2=486/6
x^2=81
x=sqrt81
x=9 ft on a side.
Proof:
6*9^2=486
6*81=486
486=486