Question

The ratio of areas of two circles are 4:9
then what is the ratio of their circumferences?

Answer 1

Answer: 2:3

Step-by-step explanation:

write A1/A2 = (pi * r1^2)/ (pi * r2^2) = 4/9,

which gives

r1^2/r2^2 = 4/9, or r1/r2 = sqrt(4/9) = 2/3, or

(2* pi * r1)/(2 * pi * r2) = 2/3, or

C1/C2 = 2/3

Answer 2

Step-by-step explanation:

ra

ratio of area=4x

ratio of area=9x

ratio of circumference=2:3