SAT II Math I : Volume

Study concepts, example questions & explanations for SAT II Math I

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Example Questions

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Example Question #91 : Geometry

What is the volume of a regular tetrahedron with an edge length of 6?

Possible Answers:

Correct answer:

Explanation:

The volume of a tetrahedron can be solved for by using the equation:

where  is the measurement of the edge of the tetrahedron. 

This problem can be quickly solved by substituting 6 in for

Example Question #81 : Advanced Geometry

What is the volume of the tetrahedron shown below? 


Screen shot 2015 10 21 at 7.16.10 pm

Possible Answers:

Correct answer:

Explanation:

The volume of a tetrahedron is .

This tetrahedron has a side with a length of 8. 

, which becomes .

You can reduce that answer further, so that it becomes 

Example Question #21 : Volume

Find the volume of sphere whose radius is 15.

Possible Answers:

Correct answer:

Explanation:

The volume of a sphere is given by the equation:

The problem says that the radius is 15, so plug in 15 for r and simplify.

Example Question #101 : Geometry

Find the volume of a sphere with the diameter of .

Possible Answers:

Correct answer:

Explanation:

Write the equation for the volume of a sphere.

The radius is half the diameter, or .

Substitute the radius into the equation.

Reduce the fractions.

The answer is:  

Example Question #21 : 3 Dimensional Geometry

Determine the volume of a rectangular prism if the length is , width is , and the height is .

Possible Answers:

 

Correct answer:

 

Explanation:

Write the formula for the volume of a rectangular prism.

Substitute the dimensions into the formula.

Reduce this fraction.

The answer is:  

Example Question #21 : 3 Dimensional Geometry

The length of a box is half its height and two-thirds its width. The volume of the box is four cubic meters. Give the length of the box to the nearest centimeter.

Possible Answers:

None of these

Correct answer:

Explanation:

Call , and  the length, width, and height of the crate. 

The length of the crate is half its height, so 

The length of the crate is two-thirds its width, so

The dimensions of the crate in terms of  are , and . The volume is their product:

Substitute:

Solve for :

 meters.

Since one meter comprises 100 centimeters, multiply by 100 to convert to centimeters:

,

which rounds to 110 centimeters.

 

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