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  1. Chapter 11 Class 8 Mensuration
  2. Serial order wise

Transcript

Ex 11.4, 5 Find the height of the cylinder whose volume is 1.54 ๐‘š^3and diameter of the base is 140 cm ? Given, Volume of cylinder = 1.54 ๐‘š^3 & Diameter = 140 cm Radius = r = 140/2 cm = 70 cm = 70/100 m = 7/10 m We need to find height of the cylinder Let h be the height of the cylinder. Now, Volume of cylinder = ๐œ‹๐‘Ÿ^2 โ„Ž 1.54 = ๐œ‹๐‘Ÿ^2 โ„Ž ๐œ‹๐‘Ÿ^2 โ„Ž = 1.54 22/7ร—(7/10)^2ร—โ„Ž = 1.54 22/7ร—7/10ร—7/10ร—โ„Ž = 154/100 (22 ร— 7)/100 โ„Ž = 154/100 (154 โ„Ž)/100 = 154/100 154 โ„Ž = 154 โ„Ž = 154/154 โ„Ž = 1 โˆด Height of cylinder = 1 m

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.