Question

from a square sheet of side 20cm one circle of radius 7 cm is cut then find the area of the remaining paper.
pls tell​

Answer 1

$\sf{\bold{\blue{\underline{\underline{Given}}}}}$

Side of a square size paper =20cm.

A circle is cut from the paper,

redius of circle =7cm.

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

Area of the square size paper

$\boxed{\pink{area ~of ~square =side^2}}$

so,

Area of the square size paper =$20^2=400cm^2$

Then,

The redius of the circle is

$\boxed{\pink{area ~of ~circle =\pi r^2}}$

so,area=$\frac{22}{7}×7^2$

$\rightsquigarrow{\frac{22}{7}×7×7}$

$\rightsquigarrow{\frac{22}{\cancel{7}}×\cancel{7}×7}$

$\rightsquigarrow{22×7}$

$\rightsquigarrow{154cm^2}$

So,

Area of the remaining paper=Area ofthe square size paper - area of the circle.

$\rightsquigarrow{400cm^2-154cm^2}$

$\rightsquigarrow{246cm^2}$

 

$\sf{\bold{\green{\underline{\underline{Answer}}}}}$

⠀⠀⠀⠀

Area of the remaining paper

$\rightsquigarrow{\red{246~cm^2}}$