Question

The circumference (C) of a swimming pool is 47 feet. Which formula can you use to find the radius (r) if you know that C = 2πr

Answer 1

You don't have to use a formula, all you have to do is use basic algebra to modify the equation in front of you. Simply divide both sides by 2pi and you will end up with C/2pi = r. Then, just type it into your calculator and you're good to go!

Answer 2

Answer:

We use the formula $Circumference = 2\pi r$ to find the the radius (r)

Step-by-step explanation:

Given : The circumference (C) of a swimming pool is 47 feet.

We have to find the the radius (r)

Since, given circumference of pool is 47 feet

and pool is in shape of circle and we know

$Circumference = 2\pi r$

Put Circumference = 47 , we get,

$47= 2\pi r$

Divide both side by 2π , we get,

$\frac{47}{2\pi}=r$

Put π = 3.14 , we have,

r = 7.48

Thus, we use the formula $Circumference = 2\pi r$ to find the the radius (r)