Question

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

20 pi in
40 pi in
60 pi in
400 pi 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