What is the ratio of the circumferences for two circles with areas 6 pi m2 and 150 pi m2?

Answer 1

area = 2pi*r2

circumference = 2pi*r

The ratio of their circumferences will be 2pi*r1 /2pi*r2 = r1/r2

1) r2 = 6pi/2pi = 3. r1 = root(3).

2) r = 150pi/2pi = 75. r2 = root(75)

So the ratio of their circumferences is

r1/r2 = root(3)/root(75)