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Ex 11.3, 2 - Chapter 11 Class 7 Perimeter and Area - Part 2

Ex 11.3, 2 - Chapter 11 Class 7 Perimeter and Area - Part 3

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Ex 11.3, 2 Find the area of the following circles, given that: (b) diameter = 49 m Diameter = 21 cm Radius = r = 𝐷𝑖𝑎𝑚𝑒𝑡𝑒𝑟/2 = 49/2 m Now, Area of circle = 𝜋 r2 = 22/7 × (49/2)^2 = 22/7 × 49/2 × 49/2 = 11/7 × 49/1 × 49/2 = 11/1 × 7 × 49/2 = (77 × 49)/2 = 3773/2 = 1886.5 m2 ∴ Required area is 1886.5 m2

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