Volume of cylinders practice

Find the volume in cubic inches of a cylinder with a diameter of 16 inches and a height of 7 inches use 3.14 for pi round your answer to the nearest hundreth

1 answer

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

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

where:

  • \( V \) is the volume,
  • \( r \) is the radius of the cylinder, and
  • \( h \) is the height of the cylinder.

Given:

  • The diameter of the cylinder is 16 inches, so the radius \( r \) is half of the diameter: \[ r = \frac{16}{2} = 8 \text{ inches} \]
  • The height \( h \) is 7 inches.

Now, substituting the values into the formula:

\[ V = 3.14 \times (8)^2 \times 7 \]

First, calculate \( (8)^2 \):

\[ (8)^2 = 64 \]

Now substitute back into the volume equation:

\[ V = 3.14 \times 64 \times 7 \]

Now, calculate \( 64 \times 7 \):

\[ 64 \times 7 = 448 \]

Now substitute that back into the equation for volume:

\[ V = 3.14 \times 448 \]

Now, calculate \( 3.14 \times 448 \):

\[ V = 1407.92 \]

Rounding to the nearest hundredth, the volume of the cylinder is:

\[ \boxed{1407.92} \text{ cubic inches} \]