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  1. Chapter 11 Class 7 Perimeter and Area
  2. Serial order wise

Transcript

Ex 11.3, 1 Find the circumference of the circles with the following radius: (๐‘‡๐‘Ž๐‘˜๐‘’ ๐œ‹=22/7) (a) 14 cm Radius = r = 14 cm Circumference = 2๐œ‹r = 2 ร— 22/7 ร— 14 = 2 ร— 22/1 ร— 2 = 44 ร— 2 = 88 cm โˆด Circumference of circle is 88 cm Ex 11.3, 1 Find the circumference of the circles with the following radius: (๐‘‡๐‘Ž๐‘˜๐‘’ ๐œ‹=22/7) (b) 28 mm Radius = r = 28 mm Circumference = 2๐œ‹r = 2 ร— 22/7 ร— 28 = 2 ร— 22 ร— 4 = 44 ร— 4 = 176 cm โˆด Circumference of circle is 176 mm Ex 11.3, 1 Find the circumference of the circles with the following radius: (๐‘‡๐‘Ž๐‘˜๐‘’ ๐œ‹=22/7) (c) 21 cm Radius = r = 21 cm Circumference = 2๐œ‹r = 2 ร— 22/7 ร— 21 = 2 ร— 22 ร— 3 = 44 ร— 3 = 132 cm โˆด Circumference of circle is 132 cm

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 8 years. He provides courses for Maths and Science at Teachoo. You can check his NCERT Solutions from Class 6 to 12.