RS Aggarwal - Mathematics

Book: RS Aggarwal - Mathematics

Chapter: 18. Area of Circle, Sector and Segment

Subject: Maths - Class 10th

Q. No. 5 of Formative Assessment (Unit Test)

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5

The circumference of a circle is 22 cm. Find its area. [Take π = 22/7]

Let the radius if circle be r


Circumference of circle = 22 cm


2πr = 22 cm


2 × 22/7 × r = 22 cm


r = 22 × 1/2 ×7/22 cm


r = 3.5 cm


Area of Circle =


= 22/7 × 3.5 × 3.5 cm2


= 38.5 cm2


Area of Circle = 38.5 cm2


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