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This sphere has a diameter of 5 m. What is the volume of the sphere?

A. [tex]V = \frac{9}{2} \pi \, \text{m}^3[/tex]
B. [tex]V = \frac{125}{6} \pi \, \text{m}^3[/tex]
C. [tex]V = \frac{500}{3} \pi \, \text{m}^3[/tex]
D. [tex]V = \frac{4000}{3} \pi \, \text{m}^3[/tex]

Sagot :

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

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

Given that the diameter of the sphere is [tex]\(5\)[/tex] meters, we can find the radius by dividing the diameter by [tex]\(2\)[/tex]:

[tex]\[ r = \frac{5}{2} = 2.5 \, \text{meters} \][/tex]

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

[tex]\[ V = \frac{4}{3} \pi (2.5)^3 \][/tex]

Calculating [tex]\(2.5\)[/tex] cubed:

[tex]\[ (2.5)^3 = 2.5 \times 2.5 \times 2.5 = 6.25 \times 2.5 = 15.625 \][/tex]

Thus, the volume formula becomes:

[tex]\[ V = \frac{4}{3} \pi \times 15.625 \][/tex]

Simplifying the calculation:

[tex]\[ V = \frac{4 \times 15.625}{3} \pi = \frac{62.5}{3} \pi \][/tex]

Thus, the volume of the sphere is:

[tex]\[ V = \frac{62.5}{3} \pi \, \text{m}^3 \][/tex]

Next, let's convert [tex]\(\frac{62.5}{3}\)[/tex] to a fraction in the simplest form to match with the given multiple choices:

The term [tex]\(62.5\)[/tex] as a fraction equals [tex]\(\frac{625}{10}\)[/tex]. So:

[tex]\[ V = \frac{625}{10} \times \frac{\pi}{3} = \frac{625}{30} \pi = \frac{125}{6} \pi \][/tex]

Thus, the correct answer matches with:

[tex]\[ V = \frac{125}{6} \pi \text{ m}^3 \][/tex]

Therefore, the volume of the sphere is:

[tex]\[ \boxed{\frac{125}{6} \pi \text{ m}^3} \][/tex]