## Which of the following is the surface area in square centimeters of the cube shown who’s edge lengths are all 5 cm? 1) 25 2) 75 3) 125 4) 15

Question

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## Answers ( )

The surface area of a cube is just the area of all six sides of the cube. Therefore, if we let s = the cube’s side,

The surface area would be

6

⋅

s

2

because the area of one face is

s

2

and there are six faces

Given this, we know from the problem that

s

=

5

We can just plug in for s.

SA =

6

⋅

5

2

SA =

6

⋅

25

SA = 150