Question

the radius of two circle are in the ratio 2:3 what is the ratio of their circumference

Answer 1

circumference of a circle is = 2πr
here we take ,..
= 2πr1/2πr2
= r1/r2
= 2/3

Answer 2

$\blue{\huge{\boxed{\star\: Solution \: \star}}}$

===> Circumference of circle = 2πr

====> let radius r1= 2 & r2=3

===> Ratio =


$\frac{2\pi \: r1}{2\pi \: r2}$

===>

$\cancel{ \frac{2\pi}{2\pi}} \frac{r1}{r2}$

====>

$\red{ \boxed{ \underline{so \: ratio \: of \: circumference \: is \: \frac{2}{3} }}}$