SAT II Math II : SAT Subject Test in Math II

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

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Example Questions

Example Question #1 : 3 Dimensional Geometry

The width of a box is two-thirds its height and three-fifths its length. The volume of the box is 6 cubic meters. To the nearest centimeter, give the width of the box.

Possible Answers:

Correct answer:

Explanation:

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

The width is two-thirds the height, so

.

Equivalently,

The width is three-fifths the length, so

.

Equivalently,

 

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

Substitute:

Taking the cube root of both sides:

 meters.

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

 centimeters,

which rounds to 134 centimeters.

Example Question #1 : Volume

Box 2

The shaded face of the rectangular prism in the above diagram is a square. The volume of the prism is ; give the value of  in terms of .

Possible Answers:

Correct answer:

Explanation:

The volume of a rectangular prism is the product of its length, its width, and its height; that is,

Since the shaded face of the prism is a square, we can set , and ; substituting and solving for :

Taking the positive square root of both sides, and simplifying the expression on the right using the Quotient of Radicals Rule:

Example Question #11 : 3 Dimensional Geometry

Find the volume of a sphere with a diameter of 10.

Possible Answers:

Correct answer:

Explanation:

The surface area of a sphere is found using the formula . We are given the diameter of the circle and so we have to use it to find the radius (r).

Plug r into the formula to find the surface area

Example Question #11 : Volume

Determine the volume of the cube with a side length of .

Possible Answers:

Correct answer:

Explanation:

Write the formula for the volume of a cube.

Substitute the length into the formula.

The volume is:  

Example Question #11 : Volume

Billy has a ice cream cone that consists of a cone and hemisphere.  Suppose the cone has a height of 4 inches, and the radius of the hemisphere is 2 inches.  Assuming that the combined shape is not irregular, what is the total volume?

Possible Answers:

Correct answer:

Explanation:

Write the volume for a cone.

Substitute the radius and height.  The radius is 2.

Write the volume for a hemisphere.  This should be half the volume of the full sphere.

Substitute the radius.

Add the volumes of the cone and hemisphere to determine the total volume.

The answer is:  

Example Question #391 : Sat Subject Test In Math Ii

Find the volume of a sphere with a diameter of .

Possible Answers:

Correct answer:

Explanation:

Divide the diameter by two to get the radius.  This is also the same as multiplying the diameter by one-half.

Write the formula for the volume of the sphere.

Substitute the radius.

Simplify the terms.

The answer is:  

Example Question #13 : 3 Dimensional Geometry

If the side of a cube is , what must be the volume?

Possible Answers:

Correct answer:

Explanation:

Write the formula for the volume of a cube.

Substitute the side length.  When we are multiplying common bases with exponents, we are adding the exponents instead.

The answer is:  

Example Question #14 : 3 Dimensional Geometry

Determine the volume of a cube if the side length is .

Possible Answers:

Correct answer:

Explanation:

Write the formula for the volume of a cube.

Substitute the side length into the equation.

The answer is:  

Example Question #15 : 3 Dimensional Geometry

The radius and the height of a cylinder are equal. If the volume of the cylinder is , what is the diameter of the cylinder?

Possible Answers:

Correct answer:

Explanation:

Recall how to find the volume of a cylinder:

Since we know that the radius and the height are equal, we can rewrite the equation:

Using the given volume, find the length of the radius.

Since the question asks you to find the diameter, multiply the radius by two.

 

Example Question #11 : Volume

Determine the volume of the cube if the side lengths are .

Possible Answers:

Correct answer:

Explanation:

The volume of a cube is:  

Substitute the dimensions.

The answer is:  

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