Question

the circumference of a circle is 44 cm .what is its radius​

Answer 1

Question :

The circumference of a circle is 44 cm, what is its radius?

Solution :

$\underline{\bold {Given:}}$

• Circumference(C) of the circle = 44 cm

$\underline{\bold {To\:Find:}}$

• Radius(R) of the circle.

$\boxed{\pink{R= \frac{C}{2\pi }}}$

$\ \implies R= \frac{C}{2\pi} \\ \\ \implies R = (\frac{44}{2 \times \frac{22}{7} } ) \: cm \\ \\ \implies R=( \frac{44}{ \frac{44}{7} } )cm \\\\ \implies R=(44 \times \frac{7}{44} ) \: cm \\ \\\implies R=7\:cm$

$\boxed{\green {\therefore {Radius\:of\:the \:circle=7\:cm}}}$

$\rule{192}{2}$

$\underline{\bold {Some\: more\: \:formula\: related \:to\: it :}}$

$\boxed {C=2\pi r}$

$\boxed{C=\pi d}$

$\boxed {D=\frac{C}{\pi}}$

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