ISEE Upper Level Math : Solid Geometry

Study concepts, example questions & explanations for ISEE Upper Level Math

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Example Questions

Example Question #1 : Cubes

The distance from one vertex of a perfectly cubic aquarium to its opposite vertex is 1.5 meters. Give the volume of the aquarium in liters.

1 cubic meter = 1,000 liters.

Possible Answers:

The correct answer is not given among the other responses.

Correct answer:

The correct answer is not given among the other responses.

Explanation:

Let  be the length of one edge of the cube. By the three-dimensional extension of the Pythagorean Theorem, 

 meters.

Cube this sidelength to get the volume:

 cubic meters.

To convert this to liters, multiply by 1,000:

 liters.

This is not among the given responses.

Example Question #4 : Finding Volume Of A Cube

Give the volume of a cube with surface area 240 square inches.

Possible Answers:

Correct answer:

Explanation:

Let  be the length of one edge of the cube. Since its surface area is 240 square inches, one face has one-sixth of this area, or  square inches. Therefore, , and .

The volume is the cube of this, or  cubic inches.

Example Question #1 : Finding Volume Of A Rectangular Prism

An aquarium is shaped like a perfect cube; the perimeter of each glass face is  meters. If it is filled to the recommended  capacity, then, to the nearest hundred cubic liters, how much water will it contain? 

Possible Answers:

Insufficient information is given to answer the question.

Note:


Correct answer:

Explanation:

A perfect cube has square faces; if a face has perimeter  meters, then each side of each face measures one fourth of this, or  meters. The volume of the tank is the cube of this, or

 cubic meters.

Its capacity in liters is  liters.

 of this is 

 liters. 

This rounds to liters, the correct response.

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

Your friend gives you a puzzle cube for your birthday. If the length of one edge is 5cm, what is the volume of the cube?

Possible Answers:

Correct answer:

Explanation:

Your friend gives you a puzzle cube for your birthday. If the length of one edge is 5cm, what is the volume of the cube?

To find the volume of a cube, use the following formula:

Where s is the side length.

Plug in what we know to get our answer:

 

Example Question #5 : How To Find The Volume Of A Cube

A cube has a side length of , what is the volume of the cube?

 

Possible Answers:

Correct answer:

Explanation:

A cube has a side length of , what is the volume of the cube?

To find the volume of a cube, use the following formula:

Plug in our known side length and solve

Making our answer:

Example Question #11 : How To Find The Volume Of A Cube

One of your holiday gifts is wrapped in a cube-shaped box. 

If one of the edges has a length of 6 inches, what is the volume of the box?

Possible Answers:

Correct answer:

Explanation:

One of your holiday gifts is wrapped in a cube-shaped box. 

If one of the edges has a length of 6 inches, what is the volume of the box?

Find the volume of a cube via the following:

Example Question #12 : Cubes

Find the volume of a cube with a height of 3in.

Possible Answers:

Correct answer:

Explanation:

To find the volume of a cube, we will use the following formula:

where a is the length of any side of the cube.

 

Now, we know the height of the cube is 3in.  Because it is a cube, all sides (lengths, widths, height) are the same.  That is why we can find any length for the formula.  

Knowing this, we can substitute into the formula.  We get

Example Question #13 : Cubes

Find the area of a cube with a length of 5cm.

Possible Answers:

Correct answer:

Explanation:

To find the volume of a cube, we will use the following formula:

where l is the length, w is the width, and h is the height of the cube.

 

Now, we know the length of the cube is 5cm.  Because it is a cube, all sides are equal.  Therefore, the width and the height of the cube are also 5cm.

Knowing this, we will substitute into the formula.  We get

Example Question #14 : Cubes

Find the volume of a cube with a height of 8in.

Possible Answers:

Correct answer:

Explanation:

To find the volume of a cube, we will use the following formula:

where l is the length, w is the width, and h is the height of the cube.

 

Now, we know the height of the cube is 8in.  Because it is a cube, all sides/lengths are equal.  Therefore, the length and width are also 8in.

Knowing this, we can substitute into the formula. We get

Example Question #15 : Cubes

While exploring an ancient ruin, you discover a small puzzle cube. You measure the side length to be . Find the cube's volume.

Possible Answers:

Correct answer:

Explanation:

While exploring an ancient ruin, you discover a small puzzle cube. You measure the side length to be . Find the cube's volume.

To find the volume of a cube, use the following formula:

So our answer is

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