Question

find the circumference of circle whose radius is 21 cm

Answer 1

this is the right answer .......

Answer 2

$\textbf{\huge\underline{\underline\red{Solution} : - }} \\ \\ \textbf{\underline{\underline\red{given} : - } radius\: of \: circle \: is \: } \\ \textbf{ \: \: \: \: \: \: \: \: \:21 \:cm. } \\ \\ \textbf{\underline{\underline\red{formula} : - }} \\ \\ = > \bold \purple{circumference \: of \:circle \: = 2 \: \pi \: r } \\ \\= > \bold \purple{circumference \: of \:circle \: = 2 \times \frac{22}{7} \times 21} \\ \\ = > \bold \purple{circumference \: of \:circle \: = 2 \times 22 \times 3} \\ \\ = > \bold \purple{circumference \: of \:circle \: = 132 \: cm } \\ \\ \bold{ \underline\red{hence \: circumference \: of \: circle \: is \: 132 \: cm.}} \\ \\ \fcolorbox{red}{white}{i \: hope \: it \: helps \: you.}$