# Volume of a Sphere

** Volume of Sphere** is the amount of liquid a sphere can hold. It is the space occupied by a sphere in 3-dimensional space. It is measured in unit

^{3 }i.e. m

^{3}, cm

^{3}, etc.

A sphere is a three-dimensional solid object with a round form in geometry. From a mathematical standpoint, it is a three-dimensional combination of a group of points connected by one common point at equal distances. A sphere, unlike other three-dimensional shapes, has no vertices or edges. Its center is equidistant from all places on its surface. In other words, the distance between the sphere’s center and any point on its surface is the same. Various spherical objects used in daily life are football, basketball, Earth, Moon, etc.

**Table of Content**

## What is Volume of Sphere?

Volume of a sphere is the amount of space it takes up within it. The sphere is a three-dimensional round solid shape in which all points on its surface are equally spaced from its centre. The fixed distance is known as the sphere’s radius, and the fixed point is known as the sphere’s centre. We will notice a change in form when the circle is turned. As a result of the rotation of the two-dimensional object known as a circle, the three-dimensional shape of a sphere is obtained.

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

V = 4/3πr^{3}where,

= radius of the spherer

= 22/7π

**Volume of Sphere Formula with its Derivation**

**Volume of Sphere Formula with its Derivation**

Using the integration approach, we can simply calculate the volume of a sphere.

Suppose the sphere’s volume is made up of a series of thin circular discs stacked one on top of the other, as drawn in the diagram above. Each thin disc has a radius of r and a thickness of dy that is y distance from the x-axis.

Let the volume of a disc be dV. The value of dV is given by,

dV = (πr

^{2})dydV = π (R

^{2}– y^{2})dyThe total volume of the sphere will be the sum of volumes of all these small discs. The required value can be obtained by integrating the expression from limit -R to R.

So, the volume of sphere becomes,

V =

=

=

=

=

=

Thus, the formula for volume of sphere is derived.

## How to Calculate Volume of Sphere?

Volume of sphere is the space occupied by a sphere. Its volume can be calculated using the formula V = 4/3πr^{3}. Steps required to calculate the volume of a sphere are:

- Mark the value of the radius of the sphere.
- Find the cube of the radius.
- Multiply the cube of the radius by (4/3)π
- Add the unit to the final answer.

**Example: Find the volume of a sphere with a radius of 7 cm.**

**Example: Find the volume of a sphere with a radius of 7 cm.**

**Solution:**

The formula for volume of a sphere, V = (4/3)πr

^{3}

Given, r = 7 cm

Volume of sphere, V = ((4/3) × π × 7^{3}) cm^{3}

V = 1436.8 cm^{3}

Thus, the volume of sphere is 1436.8 cm^{3}

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## Solved Examples on Volume of Sphere

**Example 1. Find the volume of the sphere whose radius is 9 cm.**

**Solution:**

We have, r = 9.

Volume of sphere = 4/3 πr

^{3}= (4/3) (3.14) (9) (9) (9)

= (4) (3.14) (3) (9) (9)

= 3052 cm

^{3}

**Example 2. Find the volume of the sphere whose radius is 12 cm.**

**Solution:**

We have, r = 12

Volume of sphere = 4/3 πr

^{3}= (4/3) (3.14) (12) (12) (12)

= (4) (3.14) (4) (12) (12)

= 7234.56 cm

^{3}

**Example 3. Find the volume of the sphere whose radius is 6 cm.**

**Solution:**

We have, r = 6.

Volume of sphere = 4/3 πr

^{3}= (4/3) (3.14) (6) (6) (6)

= (4) (3.14) (2) (6) (6)

= 904.32 cm

^{3}

**Example 4. Find the volume of the sphere whose radius is 4 cm.**

**Solution:**

We have, r = 4.

Volume of sphere = 4/3 πr3

= (4/3) (3.14) (4) (4) (4)

= (1.33) (3.14) (4) (4) (4)

= 267.27 cm

^{3}

**Example 5. Find the volume of the sphere whose diameter is 10 cm.**

**Solution:**

We have, 2r = 10

⇒ r = 10/2

⇒ r = 5

Volume of sphere = 4/3 πr

^{3}= (4/3) (3.14) (5) (5) (5)

= (1.33) (3.14) (5) (5) (5)

= 522.025 cm

^{3}

**Example 6. Find the volume of the sphere whose diameter is 16 cm.**

**Solution:**

We have, 2r = 16

⇒ r = 16/2

⇒ r = 8

Volume of sphere = 4/3 πr

^{3}= (4/3) (3.14) (8) (8) (8)

= (1.33) (3.14) (8) (8) (8)

= 2138.21 cm

^{3}

**Example 7. Find the volume of the sphere whose diameter is 14 cm.**

**Solution:**

We have, 2r = 14

⇒ r = 14/2

⇒ r = 7

Volume of sphere = 4/3 πr

^{3}= (4/3) (3.14) (7) (7) (7)

= (1.33) (3.14) (7) (7) (7)

= 1432.43 cm

^{3}

## FAQs on Volume of Sphere

**1. Write the Formula for the Total Surface Area of the Sphere.**

**1. Write the Formula for the Total Surface Area of the Sphere.**

Total surface area of any sphere is given by:

Area = 4πr^{2}where

is the radius of the given sphere.‘r’

**2. What is the Formula for the Volume of the Sphere?**

**2. What is the Formula for the Volume of the Sphere?**

The volume of a sphere is given by:

Volume = 4/3πr^{3}where

is the radius of the given sphere.‘r’

**3. How do we find the Volume of the HemiSphere?**

**3. How do we find the Volume of the HemiSphere?**

The volume of a hemi-sphere is given by:

Volume = 2/3πr^{3}where

is the radius of the given sphere.‘r’

**4. If a Sphere and a Hemisphere have the same Radii then what is the Ratio of their Volume?**

**4. If a Sphere and a Hemisphere have the same Radii then what is the Ratio of their Volume?**

If a sphere and a hemisphere have the same radii then the ratio of their volume is given by

V

_{1 }: V_{2}=(4/3πr^{3}) : (2/3πr^{3})= 2 : 1

**5. How do we measure the Volume of Sphere?**

**5. How do we measure the Volume of Sphere?**

The Volume of the Sphere is measured in m

^{3}, cm^{3}, litres, etc.

mis the standard unit of measurement.^{3 }

### 6. How Does the Volume of Sphere Change When the Radius of the Sphere is Halved?

Volume of sphere = (4/3)πr3 = (4/3)π(r/2)3 = (4/3)π(r3/8) = volume/8. So the volume of sphere gets one-eighth.

### 7. What is the Relation Between the Volume of Sphere and the Volume of Cylinder?

Volume of the sphere is two-third of the volume of the cylinder.

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