Question

What is the surface area of a cube with side length 9 kilometers?

two hundred sixteen square kilometers

three hundred twenty-four square kilometers

four hundred eighty-six square kilometers

seven hundred twenty-nine square kilometers

Answer 1

k if one side is something then everything is that something because its a cube correct?

Answer 2

yes

Answer 3

how many side lengths does a cube have?

Answer 4

4

Answer 5

i mean 2

Answer 6

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Answer 7

k no and no

Answer 8

we know its a cube right?

Answer 9

so in this case you can simply cube your number

Answer 10

Each face = 9 * 9 = 81 kilometers²
All six faces = 6 * 81 = 486 kilometers²