Calculating the Volume of a Quarter Sphere

Oct 13, 2025 by miodeya.com 81 views

Introduction

In geometry, a sphere is a three-dimensional shape that is perfectly round and has no corners or edges. When a sphere is cut into four equal parts, each part is called a quarter sphere. In this article, we will explore the concept of a quarter sphere and calculate its volume and surface area.

Understanding the Problem

The problem states that the shape shown below is one quarter of a solid sphere with its center at point O. The volume of this shape is given as 576π cm³. Our task is to find the surface area of this quarter sphere to three decimal places.

Visualizing the Shape

To visualize the shape, let's consider a sphere with a radius of r cm. When this sphere is cut into four equal parts, each part will be a quarter sphere. The volume of a quarter sphere is one-fourth of the volume of the entire sphere.

Calculating the Volume of a Quarter Sphere

The formula for the volume of a sphere is given by:

V = (4/3)πr³

Since we are dealing with a quarter sphere, the volume will be one-fourth of the volume of the entire sphere. Therefore, the volume of a quarter sphere is:

V = (1/4) × (4/3)πr³ = (1/3)πr³

Given that the volume of the quarter sphere is 576π cm³, we can set up the equation:

(1/3)πr³ = 576π

To solve for r, we can divide both sides of the equation by π and then take the cube root of both sides:

r³ = 1728 r = ∛1728 = 12 cm

Calculating the Surface Area of a Quarter Sphere

The surface area of a sphere is given by:

A = 4πr²

Since we are dealing with a quarter sphere, the surface area will be one-fourth of the surface area of the entire sphere. Therefore, the surface area of a quarter sphere is:

A = (1/4) × 4πr² = πr²

Substituting the value of r, we get:

A = π(12)² = 144π

To find the surface area to three decimal places, we can multiply the value by π and then round to three decimal places:

A ≈ 452.389 cm²

Conclusion

In this article, we calculated the surface area of a quarter sphere given its volume. We first found the radius of the sphere using the formula for the volume of a sphere. Then, we used the formula for the surface area of a sphere to find the surface area of the quarter sphere. The surface area of the quarter sphere is approximately 452.389 cm².

Mathematical Formulas

Volume of a sphere: V = (4/3)πr³
Surface area of a sphere: A = 4πr²
Volume of a quarter sphere: V = (1/3)πr³
Surface area of a quarter sphere: A = πr²
The Shape of a Solid Sphere: Calculating Volume and Surface Area - Q&A ====================================================================

Introduction

In our previous article, we explored the concept of a quarter sphere and calculated its volume and surface area. In this article, we will answer some frequently asked questions related to the shape of a solid sphere and its properties.

Q&A

Q: What is the formula for the volume of a sphere?

A: The formula for the volume of a sphere is given by:

V = (4/3)πr³

Where V is the volume of the sphere and r is the radius of the sphere.

Q: How do I calculate the volume of a quarter sphere?

A: To calculate the volume of a quarter sphere, you can use the formula:

V = (1/3)πr³

Where V is the volume of the quarter sphere and r is the radius of the sphere.

Q: What is the formula for the surface area of a sphere?

A: The formula for the surface area of a sphere is given by:

A = 4πr²

Where A is the surface area of the sphere and r is the radius of the sphere.

Q: How do I calculate the surface area of a quarter sphere?

A: To calculate the surface area of a quarter sphere, you can use the formula:

A = πr²

Where A is the surface area of the quarter sphere and r is the radius of the sphere.

Q: What is the relationship between the volume and surface area of a sphere?

A: The volume and surface area of a sphere are related by the following equation:

V = (4/3)πr³ A = 4πr²

Where V is the volume of the sphere and A is the surface area of the sphere.

Q: How do I find the radius of a sphere given its volume?

A: To find the radius of a sphere given its volume, you can use the formula:

V = (4/3)πr³

Rearranging this formula to solve for r, we get:

r = ∛(3V/4π)

Where V is the volume of the sphere.

Q: How do I find the surface area of a sphere given its radius?

A: To find the surface area of a sphere given its radius, you can use the formula:

A = 4πr²

Where A is the surface area of the sphere and r is the radius of the sphere.

Q: What is the significance of the π symbol in the formulas for the volume and surface area of a sphere?

A: The π symbol represents the mathematical constant pi, which is approximately equal to 3.14159. Pi is an irrational number that is used to represent the ratio of a circle's circumference to its diameter.

Q: Can I use the formulas for the volume and surface area of a sphere to calculate the volume and surface area of other shapes?

A: While the formulas for the volume and surface area of a sphere can be used to calculate the volume and surface area of other shapes, they are specific to spheres and cannot be used to calculate the volume and surface area of other shapes.

Conclusion

In this article, we answered some frequently asked questions related to the shape of a solid sphere and its properties. We hope that this article has provided you with a better understanding of the formulas for the volume and surface area of a sphere and how to use them to calculate the volume and surface area of a quarter sphere.

Mathematical Formulas

Volume of a sphere: V = (4/3)πr³
Surface area of a sphere: A = 4πr²
Volume of a quarter sphere: V = (1/3)πr³
Surface area of a quarter sphere: A = πr²
Radius of a sphere given its volume: r = ∛(3V/4π)
Surface area of a sphere given its radius: A = 4πr²