Question

please help me. I'll mark u as brainliest. please help me. ​

Answer 1

here is ur answer:

r1 : r2 = 3 : 4

circumference of circle = 2 π r

$\frac{c1}{c2} = \frac{2\pi r1}{2\pi r2} \\ \\ \frac{c1}{c2} = \frac{2\pi \: 3}{2\pi 4} \\ \\ \frac{c1}{c2} = \frac{3}{4}$

hope it helps you!

Answer 2

Answer: 3:4

Step-by-step explanation:

since the radii of the circles are in the ration 3:4, let the radius of the first circle be 3m and the radius of the second circle be 4m

We know that circumference of a circle with radius r is 2πr

Then circumference of the first circle, C₁=2π(3m)=6πm

Circumference of the second circle C₂=2π(4m)=8πm

So C₁ : C₂ = 6πm : 8πm

=6:8

=3:4