Question

What is the circumference of the circle in terms of pi radius is 20 in.

Answer 1

In this question we have to find the circumference of the circle in terms of pi where radius is 20 inches .

And to find the circumference, we use the following formula of the circumference

$circumference = 2\pi r$

Substituting the given value of r, we will get

$Circumference = 2* \pi *20 = 40 \pi \ inches$

And the correct option is the second option .

Answer 2

Circumference is given by
C=2πr
From the information:
r=20 in
thus
C=2×π×20
C=40π inches