Find the Area of a Circle Whose Circumference is 22 Cm. - Mathematics

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Sum

Find the area of a circle whose circumference is 22 cm.

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Solution

Let r be the radius of the circle, then circumference = 2πr
⇒ 2πr = 22 cm
⇒ r = `22/(2π) = (22 xx 7)/(2 xx 22) = 7/2 "cm"` 

∴ Area of circle = πr2 
∴ Area of circle = `22/7 xx 7/2 xx 7/2 "cm"^2 = 77/2 "cm"^2`
∴ Area of circle = 38.5 cm2.

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Chapter 17: Mensuration - Exercise 1

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ICSE Class 10 Mathematics
Chapter 17 Mensuration
Exercise 1 | Q 1

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