Question

If an plane can fly around the earth at the equator without stopping. It would have traveled about 24,900 miles. Find the radius of the earth.

Answer 1

Step-by-step explanation:

This equation gives circumference (24900 miles). Knowing this the formula to start off finding radius is

$c=2\pi r$

we know c(circumference) and we know pi(3.1415926535...)

so move the numbers to isolate r(radius) to look something like this

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

input the known values then solve.

$\frac{24900}{2\pi } =r$

$\frac{12450}{\pi } =r$

$3962.95808... =r$

(round this to whatever value you are looking for)

Hope This Helps :)