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Example 18 - Diameter of a circular garden is 9.8 m. Find its area.

Example 18 - Chapter 11 Class 7 Perimeter and Area - Part 2

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Example 18 Diameter of a circular garden is 9.8 m. Find its area. Diameter = 9.8 m Radius = r = π·π‘–π‘Žπ‘šπ‘’π‘‘π‘’π‘Ÿ/2 = 9.8/2 = 98/20 = 49/10 m Area of circle = πœ‹r2 = 22/7 Γ— (49/10)^2 = 22/7 Γ— 49/10 Γ— 49/10 = 22/1 Γ— 7/10 Γ— 49/10 = (154 Γ— 49)/100 = 7546/100 = 75.46 m2 ∴ Required Area is 75.46 m2

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.