Question

the radius of circle is 7cm,then area of circle is

Answer 1

area of circle = pie*r square
= 22/7*7*7
=22*7=154 sq.cm

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Answer 2

Given : The circle whose radius is 7cm.

To Find : Find the area of a circle ?

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Solution : Let the circle of the radius be x.

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$\underline{\frak{As ~we ~know~ that~:}}$

• $\boxed{\sf\pink{Area_{(Circle)}~=~πr^2}}$★

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Where,

• π = pie or 22/7
• r = Radius

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◗Radius (r) = 7cm

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$\pmb{\sf{\underline{According~ to~ the ~Given ~Question~:}}}$

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$\qquad{\sf:\implies{Area_{(Circle)}~=~πr^2}}$

$\qquad{\sf:\implies{Area_{(Circle)}~=~\dfrac{22}{7}~×~(7)^2}}$

$\qquad{\sf:\implies{Area_{(Circle)}~=~\dfrac{22}{7}~×~7~×~7}}$

$\qquad{\sf:\implies{Area_{(Circle)}~=~\dfrac{22}{\cancel{7}}~×~\cancel{49}}}$

$\qquad{\sf:\implies{Area_{(Circle)}~=~22~×~7}}$

$\qquad:\implies{\underline{\boxed{\frak{\pink{\pmb{Area_{(Circle)}~=~154~cm^2}}}}}}$★

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Hence,

$\therefore\underline{\sf{The ~area~ of ~the ~circle ~is~\bf{\underline{\pmb{154~cm^2}}}}}$