Using the approximation 3.14 for pi ​, what is the radius of a circle with circumference 50.2 ​m?

Question

I am very confused on how to do this. Thanks!

Answer 1

The circumference of a circle is the length required travel around the circle's outer edge. It is related to the radius by the formula:

$C=2\ast \pi \ast r$

Where C is the circumference, pi ($\pi$) is given as 3.14 and r is the radius. Sometimes pi is approximated in a number of ways: 22/7, 3.14, 3.1415, etc. Here you are being told to use 3.14.

Using the provided values, the equation can be solved:

$(50.2)=2\ast (3.14)\ast r$

$r=\frac{50.2}{2\ast 3.14}=7.96$

The radius of the circle is 7.96 m.