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Example Questions
Example Question #1 : How To Find The Surface Area Of A Cube
What is the surface area, in square inches, of a four-inch cube?
To answer this question, we need to find the surface area of a cube.
To do this, we must find the area of one face and multiply it by , because a cube has
faces that are square in shape and equal in size.
To find the area of a square, you multiply its length by its width. (Note that the length and width of a square are the same.) Therefore, for this data:
We now must multiply the area of one face by 6 to get the total surface are of the cube.
Therefore, the surface are of a four-inch cube is .
Example Question #4 : How To Find The Surface Area Of A Cube
What is the surface area of a cube with a volume of ? Round your answer to the nearest hundreth if necessary
First we need to find the side length of the cube. Do that by taking the cube root of the volume.
=
Next plug the side length into the formula for the surface area of a cube:
Example Question #1 : How To Find The Surface Area Of A Cube
What is the surface area, in square inches, of a cube with sides measuring ?
The surface area of a cube is a measure of the total area of the surface of all of the sides of that cube.
Since a cube contains square sides, the surface area is
times the area of a square side.
The area of one square side is sidelength sidelength, or
in this case. Therefore, the surface area of this cube is
square inches.
Example Question #3 : How To Find The Surface Area Of A Cube
What is the length of the side of a cube whose surface area is equal to its volume?
There is not enough information to determine the answer.
To find the side length of a cube whose surface area is the same as its volume, set the surface area and volume equations of a cube equal to each other, the solve for the side length:
Set these two formulas equal to eachother and solve for s.
Example Question #1 : How To Find The Surface Area Of A Cube
What is the surface area of a cube with a side of length ?
To find the surface area of a cube with a given side length, use the formula:
Example Question #1 : How To Find The Surface Area Of A Cube
Find the surface area of a cube whose side length is .
To find surface area of a cube, simply calculate the area of one side and multiply it by . Thus,
Example Question #21 : Cubes
Find the surface area of a cube whose side length is .
To find surface aarea, simply multiply the area of a face by 6 since there are 6 faces. Thus,
Example Question #22 : Cubes
Find the surface area of a cube with side length .
To solve, simply multiply the face area by . Thus,
Example Question #22 : Cubes
What is the sum of the number of vertices, edges, and faces of a cube?
20
26
None of the answers are correct
24
18
26
Vertices = three planes coming together at a point = 8
Edges = two planes coming together to form a line = 12
Faces = one plane as the surface of the solid = 6
Vertices + Edges + Faces = 8 + 12 + 6 = 26
Example Question #671 : Geometry
What is the difference in volume between a sphere with radius x and a cube with a side of 2x? Let π = 3.14
4.18x3
6.73x3
5.28x3
8.00x3
3.82x3
3.82x3
Vcube = s3 = (2x)3 = 8x3
Vsphere = 4/3 πr3 = 4/3•3.14•x3 = 4.18x3
All ACT Math Resources
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