Chelsea had the key with the side length of 4 cm.
What is the surface area of Chelsea's cube?
2
A. 64 cm
3
B. 64 cm
2
C. 96 cm
3
D. 96 cm
The surface area of a cube can be found by multiplying the side length by itself, and then multiplying that by 6 (since a cube has 6 equal sides):
Surface area = (side length)^2 * 6
In this case, the side length is 4 cm:
Surface area = (4 cm)^2 * 6
Surface area = 16 cm^2 * 6
Surface area = 96 cm^2
So the correct answer is:
C. 96 cm^2
To find the surface area of a cube, we need to calculate the area of all six faces and then add them together.
The formula for the surface area of a cube is: A = 6s², where A is the surface area and s is the side length.
In this case, the side length is given as 4 cm.
Plugging in the value of 4 cm into the formula, we get:
A = 6(4 cm)²
Simplifying the equation, we have:
A = 6(16 cm²)
A = 96 cm²
So, the correct answer is option C. 96 cm².