Answer:
C
Explanation:
The circumference (C) of a circle is calculated using
C= 2πr ← r is the radius and has to be found
Given C = 20π , then
2πr = 20π ( divide both sides by 2π )
r =
= 10
The area (A) of a circle is calculated using the formula
A = πr² = π × 10² = 100π m² → C