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Find the volume in [tex][tex]$cm^3$[/tex][/tex] of a length of pipe which has these measurements.

Volume of a cylinder [tex][tex]$ = \pi r^2 h$[/tex][/tex]

Given:
[tex]\pi = 3.14[/tex]

Volume [tex] = \square \ cm^3[/tex] (round to the nearest thousand)


Sagot :

To find the volume of a cylinder, we use the formula:

[tex]\[ \text{Volume} = \pi \cdot r^2 \cdot h \][/tex]

where:
- [tex]\(\pi\)[/tex] (pi) is approximately 3.14,
- [tex]\(r\)[/tex] (the radius) is 3 cm,
- [tex]\(h\)[/tex] (the height) is 10 cm.

Let's substitute these values into the formula step-by-step.

1. Calculate [tex]\( r^2 \)[/tex]:
[tex]\[ r^2 = 3^2 = 9 \][/tex]

2. Multiply [tex]\( r^2 \)[/tex] by [tex]\( h \)[/tex]:
[tex]\[ 9 \cdot 10 = 90 \][/tex]

3. Multiply the result by [tex]\(\pi\)[/tex]:
[tex]\[ 3.14 \cdot 90 = 282.6 \][/tex]

Thus, the volume of the cylinder is:

[tex]\[ 282.6 \, \text{cm}^3 \][/tex]

After rounding to the nearest thousandth:

The volume remains:
[tex]\[ 282.6 \, \text{cm}^3 \][/tex]

So, the volume of the pipe is [tex]\(282.6 \, \text{cm}^3\)[/tex].