Intermediate Geometry : Cubes

Study concepts, example questions & explanations for Intermediate Geometry

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Example Questions

Example Question #25 : How To Find The Volume Of A Cube

A rectangular prism with a square base is cut out of a cube as shown by the figure below.

8

Find the volume of the figure.

Possible Answers:

\(\displaystyle 2615\)

\(\displaystyle 2765\)

\(\displaystyle 2835\)

\(\displaystyle 2995\)

Correct answer:

\(\displaystyle 2835\)

Explanation:

13

Start by finding the volume of the cube.

\(\displaystyle \text{Volume of Cube}=\text{edge}^3\)

\(\displaystyle \text{Volume of Cube}=15^3=3375\)

Next, find the volume of the rectangular prism.

\(\displaystyle \text{Volume of Rectangular Prism}=\text{width}\times\text{length}\times\text{height}\)

\(\displaystyle \text{Volume of Rectangular Prism}=6 \times 6 \times 15=540\)

Subtract the volume of the rectangular prism from that of the cube to find the volume of the figure.

\(\displaystyle \text{Volume of Figure}=\text{Volume of Cube}-\text{Volume of Rectangular Prism}\)

\(\displaystyle \text{Volume of Figure}=3375- 540=2835\)

Example Question #26 : How To Find The Volume Of A Cube

A rectangular prism with a square base is cut out of a cube as shown by the figure below.

9

Find the volume of the figure.

Possible Answers:

\(\displaystyle 1140\)

\(\displaystyle 1200\)

\(\displaystyle 880\)

\(\displaystyle 990\)

Correct answer:

\(\displaystyle 1140\)

Explanation:

13

Start by finding the volume of the cube.

\(\displaystyle \text{Volume of Cube}=\text{edge}^3\)

\(\displaystyle \text{Volume of Cube}=12^3=1728\)

Next, find the volume of the rectangular prism.

\(\displaystyle \text{Volume of Rectangular Prism}=\text{width}\times\text{length}\times\text{height}\)

\(\displaystyle \text{Volume of Rectangular Prism}=7 \times 7 \times 12=588\)

Subtract the volume of the rectangular prism from that of the cube to find the volume of the figure.

\(\displaystyle \text{Volume of Figure}=\text{Volume of Cube}-\text{Volume of Rectangular Prism}\)

\(\displaystyle \text{Volume of Figure}=1728 - 588=1140\)

Example Question #27 : How To Find The Volume Of A Cube

A rectangular prism with a square base is cut out of a cube as shown by the figure below.

1

Find the volume of the figure.

Possible Answers:

\(\displaystyle 960\)

\(\displaystyle 1420\)

\(\displaystyle 1020\)

\(\displaystyle 810\)

Correct answer:

\(\displaystyle 960\)

Explanation:

13

Start by finding the volume of the cube.

\(\displaystyle \text{Volume of Cube}=\text{edge}^3\)

\(\displaystyle \text{Volume of Cube}=12^3=1728\)

Next, find the volume of the rectangular prism.

\(\displaystyle \text{Volume of Rectangular Prism}=\text{width}\times\text{length}\times\text{height}\)

\(\displaystyle \text{Volume of Rectangular Prism}=8 \times 8 \times 12=768\)

Subtract the volume of the rectangular prism from that of the cube to find the volume of the figure.

\(\displaystyle \text{Volume of Figure}=\text{Volume of Cube}-\text{Volume of Rectangular Prism}\)

\(\displaystyle \text{Volume of Figure}=1728 - 768 =960\)

Example Question #28 : How To Find The Volume Of A Cube

A rectangular prism with a square base is cut out of a cube as shown by the figure below.

11

Find the volume of the figure.

Possible Answers:

\(\displaystyle 2304\)

\(\displaystyle 2222\)

\(\displaystyle 2408\)

\(\displaystyle 2296\)

Correct answer:

\(\displaystyle 2304\)

Explanation:

13

Start by finding the volume of the cube.

\(\displaystyle \text{Volume of Cube}=\text{edge}^3\)

\(\displaystyle \text{Volume of Cube}=18^3=5832\)

Next, find the volume of the rectangular prism.

\(\displaystyle \text{Volume of Rectangular Prism}=\text{width}\times\text{length}\times\text{height}\)

\(\displaystyle \text{Volume of Rectangular Prism}=14 \times 14 \times 18=3528\)

Subtract the volume of the rectangular prism from that of the cube to find the volume of the figure.

\(\displaystyle \text{Volume of Figure}=\text{Volume of Cube}-\text{Volume of Rectangular Prism}\)

\(\displaystyle \text{Volume of Figure}=5832- 3528=2304\)

Example Question #29 : How To Find The Volume Of A Cube

A rectangular prism with a square base is cut out of the cube as shown by the figure below.

10

Find the volume of the figure.

Possible Answers:

\(\displaystyle 20250\)

\(\displaystyle 19005\)

\(\displaystyle 18920\)

\(\displaystyle 17750\)

Correct answer:

\(\displaystyle 20250\)

Explanation:

13

Start by finding the volume of the cube.

\(\displaystyle \text{Volume of Cube}=\text{edge}^3\)

\(\displaystyle \text{Volume of Cube}=30^3=27000\)

Next, find the volume of the rectangular prism.

\(\displaystyle \text{Volume of Rectangular Prism}=\text{width}\times\text{length}\times\text{height}\)

\(\displaystyle \text{Volume of Rectangular Prism}=15 \times15 \times 30=6750\)

Subtract the volume of the rectangular prism from that of the cube to find the volume of the figure.

\(\displaystyle \text{Volume of Figure}=\text{Volume of Cube}-\text{Volume of Rectangular Prism}\)

\(\displaystyle \text{Volume of Figure}=27000- 6750=20250\)

Example Question #30 : How To Find The Volume Of A Cube

A sphere with a radius of \(\displaystyle 2\) is cut out of a cube that has a side edge of \(\displaystyle 4\). What is the volume of the resulting shape?

Possible Answers:

\(\displaystyle 25.10\)

\(\displaystyle 34.11\)

\(\displaystyle 26.66\)

\(\displaystyle 30.49\)

Correct answer:

\(\displaystyle 30.49\)

Explanation:

Since the cube is bigger, we will be subtracting the volume of the sphere from the volume of the cube.

Start by recalling how to find the volume of a sphere.

\(\displaystyle \text{Volume of Sphere}=\frac{4}{3}\pi r^3\)

Plug in the given radius to find the volume.

\(\displaystyle \text{Volume of Sphere}=\frac{4}{3}\pi(2)^3=\frac{32}{3}\pi\)

Next, recall how to find the volume of a cube:

\(\displaystyle \text{Volume of Cube}=(\text{edge})^3\)

Plug in the given side length to find the volume of the cube.

\(\displaystyle \text{Volume of Cube}=4^3=64\)

Finally, subtract the volume of the sphere from the volume of the cube.

\(\displaystyle \text{Volume of Figure}=64-\frac{32}{3}\pi=30.49\)

Make sure to round to \(\displaystyle 2\) places after the decimal.

Example Question #31 : How To Find The Volume Of A Cube

A sphere with a radius of \(\displaystyle 1\) is cut out of a cube that has a side length of \(\displaystyle 5\). What is the volume of the resulting figure?

Possible Answers:

\(\displaystyle 122.12\)

\(\displaystyle 120.81\)

\(\displaystyle 109.58\)

\(\displaystyle 106.65\)

Correct answer:

\(\displaystyle 120.81\)

Explanation:

Since the cube is bigger, we will be subtracting the volume of the sphere from the volume of the cube.

Start by recalling how to find the volume of a sphere.

\(\displaystyle \text{Volume of Sphere}=\frac{4}{3}\pi r^3\)

Plug in the given radius to find the volume.

\(\displaystyle \text{Volume of Sphere}=\frac{4}{3}\pi(1)^3=\frac{4}{3}\pi\)

Next, recall how to find the volume of a cube:

\(\displaystyle \text{Volume of Cube}=(\text{edge})^3\)

Plug in the given side length to find the volume of the cube.

\(\displaystyle \text{Volume of Cube}=5^3=125\)

Finally, subtract the volume of the sphere from the volume of the cube.

\(\displaystyle \text{Volume of Figure}=125-\frac{4}{3}\pi=120.81\)

Make sure to round to \(\displaystyle 2\) places after the decimal.

Example Question #32 : How To Find The Volume Of A Cube

A sphere with a radius of \(\displaystyle 3\) is cut out of a cube with a side length of \(\displaystyle 6\). What is the volume of the resulting figure?

Possible Answers:

\(\displaystyle 102.90\)

\(\displaystyle 98.20\)

\(\displaystyle 101.21\)

\(\displaystyle 110.51\)

Correct answer:

\(\displaystyle 102.90\)

Explanation:

Since the cube is bigger, we will be subtracting the volume of the sphere from the volume of the cube.

Start by recalling how to find the volume of a sphere.

\(\displaystyle \text{Volume of Sphere}=\frac{4}{3}\pi r^3\)

Plug in the given radius to find the volume.

\(\displaystyle \text{Volume of Sphere}=\frac{4}{3}\pi(3)^3=36\pi\)

Next, recall how to find the volume of a cube:

\(\displaystyle \text{Volume of Cube}=(\text{edge})^3\)

Plug in the given side length to find the volume of the cube.

\(\displaystyle \text{Volume of Cube}=6^3=216\)

Finally, subtract the volume of the sphere from the volume of the cube.

\(\displaystyle \text{Volume of Figure}=216-36\pi=102.90\)

Make sure to round to \(\displaystyle 2\) places after the decimal.

Example Question #33 : How To Find The Volume Of A Cube

A sphere with a radius of \(\displaystyle \frac{1}{2}\) is cut out of a cube with a side length of \(\displaystyle 2\). What is the volume of the resulting figure?

Possible Answers:

\(\displaystyle 5.02\)

\(\displaystyle 6.67\)

\(\displaystyle 4.12\)

\(\displaystyle 7.48\)

Correct answer:

\(\displaystyle 7.48\)

Explanation:

Since the cube is bigger, we will be subtracting the volume of the sphere from the volume of the cube.

Start by recalling how to find the volume of a sphere.

\(\displaystyle \text{Volume of Sphere}=\frac{4}{3}\pi r^3\)

Plug in the given radius to find the volume.

\(\displaystyle \text{Volume of Sphere}=\frac{4}{3}\pi(\frac{1}{2})^3=\frac{1}{6}\pi\)

Next, recall how to find the volume of a cube:

\(\displaystyle \text{Volume of Cube}=(\text{edge})^3\)

Plug in the given side length to find the volume of the cube.

\(\displaystyle \text{Volume of Cube}=2^3=8\)

Finally, subtract the volume of the sphere from the volume of the cube.

\(\displaystyle \text{Volume of Figure}=8-\frac{1}{6}\pi=7.48\)

Make sure to round to \(\displaystyle 2\) places after the decimal.

Example Question #34 : How To Find The Volume Of A Cube

A sphere with a radius of \(\displaystyle 4\) is cut out of a cube that has a side length of \(\displaystyle 7\). What is the volume of the resulting figure?

Possible Answers:

\(\displaystyle 98.09\)

\(\displaystyle 74.92\)

\(\displaystyle 101.45\)

\(\displaystyle 65.10\)

Correct answer:

\(\displaystyle 74.92\)

Explanation:

Since the cube is bigger, we will be subtracting the volume of the sphere from the volume of the cube.

Start by recalling how to find the volume of a sphere.

\(\displaystyle \text{Volume of Sphere}=\frac{4}{3}\pi r^3\)

Plug in the given radius to find the volume.

\(\displaystyle \text{Volume of Sphere}=\frac{4}{3}\pi(4)^3=\frac{256}{3}\pi\)

Next, recall how to find the volume of a cube:

\(\displaystyle \text{Volume of Cube}=(\text{edge})^3\)

Plug in the given side length to find the volume of the cube.

\(\displaystyle \text{Volume of Cube}=7^3=343\)

Finally, subtract the volume of the sphere from the volume of the cube.

\(\displaystyle \text{Volume of Figure}=343-\frac{236}{3}\pi=74.92\)

Make sure to round to \(\displaystyle 2\) places after the decimal.

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