Calculate Surface Area: Cube with 3 cm Edges

Question

A cube has edges measuring 3 cm.

Calculate the surface area of the cube.

00:00 Calculate the surface area of the cube

00:03 Edge length according to the given data

00:06 We'll use the formula for calculating cube surface area

00:10 6 times the edge squared

00:13 We'll substitute the edge length and solve for surface area

00:16 Calculate 9 squared

00:21 And this is the solution to the question

To calculate the surface area of a cube, we use the formula:

$\text{Surface Area} = 6a^2$

where $a$ is the length of each edge of the cube.

Given $a = 3 \text{ cm}$ , we substitute this value into the formula:

$\text{Surface Area} = 6 \times (3)^2$

$= 6 \times 9$

$= 54 \text{ cm}^2$

Therefore, the surface area of the cube is $54 \text{ cm}^2$ .

This matches choice 4.

$54$ cm².