The Circumference of a Circle is 22 Cm. Find Its Area. - Mathematics

Sum

The circumference of a circle is 22 cm. Find its area.

Solution

Let r cm be the radius of the circle.

Now,

Circumference of the circle:

2pi"r" = 22

rArr 2 xx 22/7 xx r=22

=>"r" = (22xx7/44) "cm"

=> "r" = 7/2

Also,

Area of the circle = πr2

= (22/7xx7/2xx7/2) "cm"^2

= 77/2 " cm"^2

= 38.5 cm2

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APPEARS IN

RS Aggarwal Secondary School Class 10 Maths
Chapter 18 Area of Circle, Sector and Segment
Formative Assessment | Q 5 | Page 852