High School Math : How to find the volume of a cube

Study concepts, example questions & explanations for High School Math

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Example Questions

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Example Question #601 : Geometry

Find the volume of the following cube:

Length_of_diagonal

Possible Answers:

Correct answer:

Explanation:

The formula for the volume of a cube is

,

where  is the side of the cube.

Plugging in our values, we get:

Example Question #1 : How To Find The Volume Of A Cube

What is the difference in volume between a sphere with radius x and a cube with a side of 2x? Let π = 3.14

Possible Answers:

4.18x3

8.00x3

6.73x3

5.28x3

3.82x3

Correct answer:

3.82x3

Explanation:

Vcube = s3 = (2x)3 = 8x3

Vsphere = 4/3 πr3 = 4/3•3.14•x3 = 4.18x

 

Example Question #1 : How To Find The Volume Of A Cube

The density of gold is and the density of glass is .  You have a gold cube that is  in length on each side.  If you want to make a glass cube that is the same weight as the gold cube, how long must each side of the glass cube be?

Possible Answers:

Correct answer:

Explanation:

Weight = Density * Volume

Volume of Gold Cube = side3= x3

Weight of Gold = 16 g/cm3 * x3

Weight of Glass = 3/cm3  * side3

Set the weight of the gold equal to the weight of the glass and solve for the side length:

16* x3 = 2  * side3

side3 = 16/2* x3 =  8 x3

Take the cube root of both sides:

side = 2x

Example Question #3 : How To Find The Volume Of A Cube

A cube has edges that are three times as long as those of a smaller cube. The volume of the bigger cube is how many times larger than that of the smaller cube?

Possible Answers:

Correct answer:

Explanation:

If we let  represent the length of an edge on the smaller cube, its volume is .

The larger cube has edges three times as long, so the length can be represented as . The volume is , which is .

The large cube's volume of  is 27 times as large as the small cube's volume of .

 

Example Question #3 : How To Find The Volume Of A Cube

If a cube has its edges increased by a factor of 5, what is the ratio of the new volume to the old volume?

Possible Answers:

Correct answer:

Explanation:

A cubic volume is . Let the original sides be 1, so that the original volume is 1. Then find the volume if the sides measure 5.  This new volume is 125.  Therefore, the ratio of new volume to old volume is 125: 1.

Example Question #62 : Solid Geometry

A cube has a side length of  meters. What is the volume of the cube? 

Possible Answers:

Correct answer:

Explanation:

The formula for the volume of a cube is: 

Since the length of one side is  meters, the volume of the cube is: 

 meters cubed. 

Example Question #63 : Solid Geometry

If the length of the side of a cube is , which expression represents the volume of the cube?

Possible Answers:

none of the other answers

Correct answer:

Explanation:

The formula for the volume of the cube is 

Plugging that into Volume equation, we find  and 

 

Thus, the answer is 512x6

Example Question #4 : How To Find The Volume Of A Cube

A tank measuring 3in wide by 5in deep is 10in tall.  If there are two cubes with 2in sides in the tank, how much water is needed to fill it?

Possible Answers:

Correct answer:

Explanation:

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