1. Chapter 9 Class 7 Perimeter and Area
  2. Serial order wise
  3. Ex 9.2
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Ex 9.2, 3 - Chapter 9 Class 7 Perimeter and Area

Last updated at Dec. 16, 2024 by Teachoo

Transcript

Ex 9.2, 3 If the circumference of a circular sheet is 154 m, find its radius. Also find the area of the sheet. (๐‘‡๐‘Ž๐‘˜๐‘’ ๐œ‹=22/7) Radius = r = ? Given, Circumference = 154 m 2๐œ‹r = 154 2 ร— 22/7 ร— r = 154 (2 ร— 22)/7 ร— r = 154 r = 154 ร— ๐Ÿ•/(๐Ÿ ร— ๐Ÿ๐Ÿ) r = 77 ร— 7/22 r = 7 ร— 7/2 r = 49/2 r = 24.5 m Now, Area of circle = ๐œ‹r2 = ๐Ÿ๐Ÿ/๐Ÿ• ร— (๐Ÿ๐Ÿ’.๐Ÿ“)^๐Ÿ = 22/7 ร— (49/2)^2 = ๐Ÿ๐Ÿ/๐Ÿ• ร— ๐Ÿ’๐Ÿ—/๐Ÿ ร— ๐Ÿ’๐Ÿ—/๐Ÿ = 11/7 ร— 49 ร— 49/2 = 11 ร— 7 ร— 49/2 = 11 ร— 343/2 = ๐Ÿ‘๐Ÿ•๐Ÿ•๐Ÿ‘/๐Ÿ = 1886.5 m2 Therefore, Radius of circular sheet is 24.5 m & Area of circular sheet is 1886.5 m2
  1. Chapter 9 Class 7 Perimeter and Area
  2. Serial order wise

    3. Ex 9.2

    Examples →
Examples →
Chapter 9 Class 7 Perimeter and Area
Serial order wise

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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 14 years. He provides courses for Maths, Science and Computer Science at Teachoo