Question

the radii of 2 circles are in the ratio 2:3 .what is the ratio of their circumference?​

Answer 1

2/3

let radius of first and second circle be R1 and R2 respectively.

So, R1/R2= 2/3

Ratio of their circumference

= (2πR1)/(2πR2)

= R1/R2

= 2/3

plz mark as the brainliest

Answer 2

so first let's get the formula of circumference of the circle.

it is

$2\pi \: r$

now the ratio is 2:3

so to find out there circumference ratio

we do it like this

we know that r is radius and let the pie be pie only

$\frac{2\pi \times 2}{2\pi \times 3}$

pie and pie get cancelled

two and two get cancelled as they are in opposite sides.

so 2/3 is the answer

which when converting to ratio is 2:3