Exercise 1 Page 455

We can calculate the volume of a cylinder with the radius

r

and height

h

using the following formula.

V = π r^{2} h

First we find the radius of the cylinder by dividing the diameter by

2 .

r = \frac{1 5}{2} = 7.5

Now we can get

V

by substituting the value of the radius and the height into the formula.

V = π r^{2} h

$r = 7.5$ , $h = 7$

V = π (7.5)^{2} (7)

▼

Simplify right-hand side

Calculate power

V = π (56.25) (7)

V = 393.75 π

Use a calculator

V = 1237.002107 \dots

Round to $1$ decimal place(s)

V \approx 1237.0

The approximate volume of the given cylinder is

1237.0

cubic feet.