Question

the ratio of circumference and area of the circle is 2:7. find its circumference.



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Answer 1

Hello ❤️

Area of circle = πr²

Circumference of circle = 2πr

Ratio of the circle = 2: 7 ( Given)

2πr

πr²

=2/7

=2/r = 2/7

= r= 7

Circumference of the Circle = 2πr

= 2π(7)

=14π

Hope it will help you ✌️

Answer 2

Question :-

the ratio of circumference and area of the circle is 2:7. find its circumference.

Answer :-

→ 44 cm .

To Find :-

→ Cirumfrance of circle

Formula used :-

$\sf{area \: of \: circle = \pi \: {r}^{2} } \\ \\ \sf{ perimeter \: of \: circle \: = 2 \pi \: r}$

Step by step explanation:-

Given that,

Ratio of Cirumfrance and area of circle is 2:7

,

$\implies \sf{ \frac{ 2 \pi \: r}{ \pi {r}^{2} } = \frac{2}{7} } \\ \\ \implies \boxed{ r \: = 7}$

Therefore ,

Cirumfrance of circle is

→ 2 π ×7

→ 14 π

→ 14× 22/7

→ 44 cm