Question

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

Answer 1

Answer:

$\boxed {\tt 94.2 \ feet}$

Step-by-step 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.

Answer 2

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.