Question

Help me with this question

Answer 1

20
`\pi`

Explanation:

Circumference formula:
`2\pi r`

Since the diameter is 20, the radius will be half of the diameter

r=d/2, where d=20

r=20/2=10

C=
`2\pi r`

C=2(10)
`\pi`

C=20
`\pi`