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Find the volume of a cylinder with a diameter of 10 inches and a height of 20 inches.

A. 1,570 cu. in.
B. 62.8 cu. in.
C. 705 cu. in.
D. 6,280 cu. in.

Answer :

To find the volume of a cylinder, you can use the formula:

[tex]\[ \text{Volume} = \pi \times \text{radius}^2 \times \text{height} \][/tex]

1. Find the radius:
The diameter of the cylinder is given as 10 inches. The radius is half of the diameter, so:

[tex]\[ \text{Radius} = \frac{\text{Diameter}}{2} = \frac{10}{2} = 5 \text{ inches} \][/tex]

2. Find the volume:
Now that we have the radius, we can plug it into the formula along with the height (20 inches):

[tex]\[ \text{Volume} = \pi \times (5)^2 \times 20 \][/tex]

3. Calculate the volume:
- First, calculate [tex]\(5^2 = 25\)[/tex].
- Next, multiply by the height: [tex]\(25 \times 20 = 500\)[/tex].
- Finally, multiply by [tex]\(\pi\)[/tex], which is approximately 3.14159:

[tex]\[ \text{Volume} = 3.14159 \times 500 \approx 1570.8 \text{ cubic inches} \][/tex]

So, the volume of the cylinder is approximately 1,570 cubic inches. The best answer choice is indeed:

A. 1,570 cu. in.

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Rewritten by : Jeany