Question

What is the circumference of a circle if the radius is 4?

Answer 1

90.8

Explanation:

cercumference=πD

r=2×D

C=2πr

c=2×π×4

π=22/7 or 3.14 so,

C=90.8

Answer 2

25.1cm

Explanation:

since circumference =
`\pi`d and d=2r

c=
`\pi`(2*4)

c=8
`\pi`

c=25.132741229

c=25.1cm