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Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class


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Example 13 Diameter of a circular garden is 9.8 m. Find its area.Diameter = 9.8 m Radius = r = 𝐷𝑖𝑎𝑚𝑒𝑡𝑒𝑟/2 = (𝟗.𝟖)/𝟐 = 98/20 = 𝟒𝟗/𝟏𝟎 m Area of circle = 𝜋r2 = 𝟐𝟐/𝟕 × (𝟒𝟗/𝟏𝟎)^𝟐 = 22/7 × 49/10 × 49/10 = 𝟐𝟐/𝟏 × 𝟕/𝟏𝟎 × 𝟒𝟗/𝟏𝟎 = (𝟏𝟓𝟒 × 𝟒𝟗)/𝟏𝟎𝟎 = 7546/100 = 75.46 m2 ∴ Required Area is 75.46 m2

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.