RS Aggarwal - Mathematics

Book: RS Aggarwal - Mathematics

Chapter: 18. Area of Circle, Sector and Segment

Subject: Maths - Class 10th

Q. No. 2 of Multiple Choice Questions (MCQ)

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2

The area of a circle is 49π cm2. Its circumference is

Let the radius if circle be r


Given, Area of circle = 49π cm2


Area of circle = πr2


πr2 = 49π


Since = 22/7


πr2 = 49π


r2 = 49


r = √49 = 7 cm


Radius of circle = 7 cm


Circumference of circle = 2πr


= 2 × π × 7 cm


= 14π cm


Circumference of the circle is 14π cm

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