Question

3. Find the ratio of circumference and area of a circle having radius 3 cm??​

Answer 1

Answer:

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Answer 2

Step-by-step explanation:

Area of the circle equals to

$\pi {r}^{2} \\ = \frac{22}{7} \times 3 \times 3 \\ = \frac{22}{7 } \times 9 \\ = 28.28$

therefore the area is equal to 28. 28(approx.) square centimetre

now the circumference of the circle is equal to

$= 2\pi \: r \\ = 2 \times \frac{22}{7} \times 3 \\ = 6 \times \frac{22}{7} \\ = \frac{132}{7} \\ = 18.86$

now the circumference of the circle is 18.86cm (approximately)

and now finally the ratio of them

=πr*r/2πr

=3*3/2*3

=3/2

therefore there ratio are 2: 3

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