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

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

Answer :

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

[tex]\[ V = \pi r^2 h \][/tex]

where:
- [tex]\( V \)[/tex] is the volume,
- [tex]\( r \)[/tex] is the radius of the base, and
- [tex]\( h \)[/tex] is the height of the cylinder.

In this problem, the cylinder has a diameter of 10 inches. The radius is half of the diameter, so:

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

The height of the cylinder is given as 20 inches.

Now, we can plug these values into the formula:

[tex]\[ V = \pi \times (5)^2 \times 20 \][/tex]

This simplifies to:

[tex]\[ V = \pi \times 25 \times 20 \][/tex]

[tex]\[ V = \pi \times 500 \][/tex]

Using the value of [tex]\(\pi \approx 3.14159\)[/tex]:

[tex]\[ V \approx 3.14159 \times 500 \][/tex]

[tex]\[ V \approx 1570.8 \text{ cubic inches} \][/tex]

Therefore, the volume of the cylinder is approximately 1,570 cubic inches. Thus, the best answer is:

OD. 1,570 cu. in.

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Rewritten by : Jeany