Answer:
C = 10π ft
Explanation:
the circumference (C) of a circle is calculated as
C = 2πr ( r is the radius )
to find r use the area formula, that is
A = πr² = 25π ( divide both sides by π )
r² = 25 ( take square root of both sides )
r =
= 5
then
C = 2π × 5 = 10π ft