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The diameter of a sphere is 4 centimeters. Which represents the volume of the sphere?

A. [tex]$\frac{32}{3} \pi \, \text{cm}^3$[/tex]
B. [tex]$8 \pi \, \text{cm}^3$[/tex]
C. [tex]$\frac{64}{3} \pi \, \text{cm}^3$[/tex]
D. [tex]$16 \pi \, \text{cm}^3$[/tex]

Sagot :

To determine the volume of a sphere, we need to use the formula for the volume of a sphere:

[tex]\[ V = \frac{4}{3} \pi r^3 \][/tex]

Where:
- [tex]\( V \)[/tex] is the volume.
- [tex]\( r \)[/tex] is the radius of the sphere.
- [tex]\( \pi \)[/tex] is a constant approximately equal to 3.14159.

First, we need to find the radius of the sphere. The diameter of the sphere is given as 4 centimeters. The radius is half of the diameter, so:

[tex]\[ r = \frac{d}{2} = \frac{4 \, \text{cm}}{2} = 2 \, \text{cm} \][/tex]

Now, we can substitute the radius back into the volume formula:

[tex]\[ V = \frac{4}{3} \pi (2 \, \text{cm})^3 \][/tex]

Next, we calculate the cube of the radius:

[tex]\[ (2 \, \text{cm})^3 = 2^3 \, \text{cm}^3 = 8 \, \text{cm}^3 \][/tex]

Substituting this back into the volume formula gives us:

[tex]\[ V = \frac{4}{3} \pi \times 8 \, \text{cm}^3 \][/tex]

[tex]\[ V = \frac{32}{3} \pi \, \text{cm}^3 \][/tex]

So, the volume of the sphere is:

[tex]\[ V = \frac{32}{3} \pi \, \text{cm}^3 \][/tex]

Among the given options, the correct one is:

[tex]\[ \mathbf{\frac{64}{3} \pi \, \text{cm}^3} \][/tex]