Question

If area of a circle measures 16/25 pi cm square, what is the circumference of the circle in terms of pi

Answer 1

A = pi*r^2

(16/25)*pi = pi*r^2

16/25 = r^2

rt(16/25) = r

r = 4/5


C = 2pi*r
C = 2pi*(4/5)
C = (8/5) pi cm