Question 25 - CBSE Class 10 Sample Paper for 2020 Boards - Maths Basic - Solutions of Sample Papers for Class 10 Boards

Last updated at Oct. 24, 2019 by Teachoo

Find the area of circle whose circumference is 22 cm.

Question 25 - CBSE Class 10 Sample Paper for 2020 Boards - Maths Basic

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Note : This is similar to Ex 12.2, 2 of NCERT – Chapter 12 Class 10

Check the answer here https://www.teachoo.com/1851/547/Ex-12.2--2---Find-area-of-a-quadrant-whose-circumference-is-22/category/Ex-12.2/

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Transcript

Question 25 Find the area of circle whose circumference is 22 cm. Given that Circumference = 2πr 22 = 2πr 22 = 2 × 22/7 × r 22 × 1/2×(7 )/22 = r 7/2 = r r = 7/2 cm Now, Area of circle = πr2 = 22/7×(7/2)^2 = 22/7×(7 × 7)/(2 × 2) = 11/1×7/2 = 77/2 = 38.5 cm2

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