Ex 9.2, 15 - Chapter 9 Class 7 Perimeter and Area

Last updated at Dec. 16, 2024 by

Ex 9.2, 15 - Find the circumference of the inner and outer circles - Ex 9.2

part 2 - Ex 9.2, 15 - Ex 9.2 - Serial order wise - Chapter 9 Class 7 Perimeter and Area

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Ex 9.2, 15 Find the circumference of the inner and the outer circles, shown in the adjoining figure? (Take π = 3.14) Outer circle Radius of outer circle = R = OB = 19 m Circumference of outer circle = 2𝜋R = 2 × 3.14 × 19 = (2 × 314 × 19)/100 = 𝟔𝟐𝟖/𝟏𝟎𝟎 × 19 = 11932/100 Inner circle Radius of inner circle = 19 − 10 = 9 cm Circumference of inner circle = 2𝜋r = 2 × 3.14 × 9 = 2 × 314/100 × 9 = 𝟔𝟐𝟖/𝟏𝟎𝟎 × 9 = 5652/100 = 56.52 m ∴ Circumference of outer circle is 119.32 m & Circumference of inner circle is 56.52 m

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo