Question

The radius of a circle measures 15 ft. What is the circumference of the circle?

Use 3.14 for n, and do not round your answer. Be sure to include the correct unit in your answer

Answer 1

Answer:-

• The required answer is 94.2 feet.

Solution:-

We have formula for this type Questions

c = πdc = πd

Here:-

• d is the diameter.

We have radius in the Question so we can easily find diameter.

According to Question:-

The diameter is twice the radius.

=> d = 2rd = 2r

Also we know that the radius is 15 feet.

So:-

=> d = 2 * 15 \ ftd

=> d = 2∗15 ft

On Calculation:-

=> d = 30 \ ftd = 30 ft

=> c= \pi dc=πd

=> c=\pi * 30 \ ftc=π∗30 ft

=> c=3.14 * 30 \ ftc=3.14∗30 ft

=> c= 94.2 \ ftc=94.2 ft

Therefore:-

The required answer is 94.2 feet.

Answer 2

`\boxed {\tt 94.2 \ feet}`

Explanation:

The circumference of a circle can be found using the following formula:

`c= \pi d`

where d is the diameter. We are given the radius, so let's find the diameter.

The diameter is twice the radius.

`d=2r`

The radius is 15 feet.

`d= 2 * 15 \ ft`

Multiply.

`d= 30 \ ft`

Now we know the diameter. Substitute 30 feet in for d.

`c= \pi d`

`c=\pi * 30 \ ft`

We are using 3.14 for pi, so substitute it in.

`c=3.14 * 30 \ ft`

Multiply.

`c= 94.2 \ ft`

The circumference of the circle is 94.2 feet.