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Finnd the total area of a cube with an edge of 9.

A) 324 square units

B) 486 square units

C) 162 square units

D) 398 square units

 Nov 2, 2017
 #1
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Since area is in square units rather than cube units, I'm going to assume this is the surface area, not the volume.

Each edge = 9, so each side has an area of 81 units2. Since a cube has 6 sides, the overall area is (side area) times 6. \(81 \times 6 = 486\) units2, so the answer is b.

 Nov 2, 2017

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