Question

ratio of circumference of two circle 2:9. find ratio of their areas​

Answer 1

Answer:

4/81

Explanation:

circumference of a circle =2πr

ratio=2πR/2πr=R/r=2/9

area of a circle=πr²

ratio=πR²/πr²=R²/r²=(2/9)²=4/81.