Question

the ratio of the radius of two circle is 5:7 what is ratio of their circumference
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Answer 1

Step-by-step explanation:

Radius of A circle = 5x

Radius of B circle = 7x

Circumferenc of A circle = 220/7x

Circumferenc of B circle = 44x

Answer 2

Answer: 5:7

Step-by-step explanation:

Let Radius of smaller circler, r=5k

Radius of bigger circle, R=7k

Then Circumference of:

smaller circle

$= 2\pi \: \times 5k \: = 10\pi \: k$

1. bigger circle

$2\pi \times 7k = 14\pi \: k$

So Ratio of circunfrance of smaller circle to bigger circle is =

$10\pi \: k \div 14\pi \: k \:$

= 5:7