Question

Find the circumference of the inner and the outer circles, shown in the adjoining figure?
(Take pie = 3.14)​

Answer 1

Outer area = 10 m

Inner Radius = 19-10 m = 9m

Circumference = 2πr = 2×3.14×9 = 61.2 m

Answer 2

Answer:

Question:-

Find the circumference of the inner and the outer circles, shown in the adjoining figure?

Given:-

radius of outer circle = 10cm

radius of in inner circle = 19-10=9cm

To Find:-

circumference

Solution:-

circumference =

$2\pi \: r$

let's begin:

$circumference \: of \: inner \: circle = 2\pi \: r \\ circumference \: of \: inner \: circle = 2 \times 3.14 \times 9 \\ circumference \: of \: inner \: circle = 56.52cm$

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$circumference \: of \: outer \: circle = 2\pi \: r \\ circumference \: of \: outer \: circle = 2 \times 3.14 \times 10 \\ circumference \: of \: outer \: circle = 62.8cm$

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Conclusion:-

⟹ circumferenceof inner circle$\mathbb{\boxed{\purple{=56.52cm}}\star}$

⟹circumference of outer circle  $\mathbb{\boxed{\purple{=62.8cm}}\star}$

hope this helps.!