Question

the circles have radii 7cm & 14cm respectively find ratio of perimeter​

Answer 1

Step-by-step explanation:

Given R1 = 7 cm and R2 = 14 cm,

Perimeter or circumference of a circle is given by,

$2\pi r$

Ratio of circumference =

Perimeter of circle 1 : Perimeter of circle 2

$2\pi r1 : 2\pi r 2 \\ \\ = > 7 : 14 \\ \\ = > 1 : 2$

Therefore ratio is 1:2

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