Question

if radius is 14 and thier diameter is 28 so what's their cricumfrence?​

Answer 1

Answer:

Perimeter of circle = 2πr

Radius = 14

= 2 × 3.14 × 14

= 87.92

(Taking π as 3.14)

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Answer 2

$\huge\underline{\sf \green {given : - }}$

• Radius = 14
• Diameter = 28

$\huge \underline {\sf \green{to \: find :࿐ }}$

• Circumference

$\huge \sf \underline{ \sf \green{solution : ࿐}}$

$\sf \: radius \: = 14cm \: (given)$

$\tt \: circumference = 2\pi r \\ \tt \: = 2 \times \frac{22}{ \cancel{7}} \times \cancel{ {14}^{2} } \\ \\ \tt = 2 \times 22 \times 2 \\ = 88$

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$\tt \: diameter = 28cm \: \: \: (given) \\ = \sf \: r = \frac{d}{2 } = \frac{ \cancel{28}}{ \cancel{2}} = 14$

$\tt \: circumference \: = 2 \times \frac{22}{7} \times 14 \\ \\ \tt = 2 \times \frac{22}{ \cancel{22}} \times \cancel{14}$

$\tt \: = 2 \times 22 \times 2 \\ = \tt88$