Question

the ratio of the area of two circles is 16:81. find the ratio of their circumference.
answer and get point plz reply

Answer 1

pir2/piR2=16/81
r2/R2=16/81
r/R=4/9
hence ratio of the circumference is
2pir/2piR=r/R=4/9

Answer 2

We know that Area of a circle =пr²
So, п r₁²/пr₂² =16/81
So,r₁/r₂=√(16/81)=4/9
Dividing and Multiplying with $\pi r^2$ on BS
$2 \pi r1^2 /2 \pi r2^2$ = 4/9
So the Ratios between the Circumference is 4/9