The perimeter of a cube face is 32 cm. Find the surface area of the cube. Find the volume of a cube?
March 9, 2021 | education
| Suppose the length of the edge of the cube is equal to a.
By condition, the perimeter of the face is 32 cm.Since the perimeter of the face is P = 4 * a, we can find what the length of the edge of the cube is equal to:
4 * a = 32,
a = 8 (cm).
The area of the face is S = a2, therefore the area of one face of the cube will be equal to:
S = 82 = 64 (cm2).
Since a cube has six faces, its surface area will be equal to:
S = 64 * 6 = 384 (cm2).
The volume of the cube is V = a3 = 8 3 = 512 (cm 3).
Answer: S = 384 cm2, V = 512 cm 3.
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