Slide29.JPG

Slide30.JPG

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

Transcript

Example 7 Find the height of a cylinder whose radius is 7 cm and the total surface area is 968 ใ€–๐‘๐‘šใ€—^2. Given, Radius of Cylinder = 7 cm Total surface area = 968 c๐‘š^2 Let Height of Cylinder = h Total Surface Area = 968 m2 2๐œ‹๐‘Ÿ(๐‘Ÿ+โ„Ž) = 968 2ร—22/7ร—7ร—(7+โ„Ž) = 968 2ร—22(7+โ„Ž) = 968 44ร—(7+โ„Ž) = 968 7+โ„Ž = 968/44 7+โ„Ž = 484/22 7+โ„Ž = 242/11 7+โ„Ž = 22 โ„Ž = 22โˆ’7 โ„Ž = 15 cm โˆด . The height of the cylinder is 15 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 9 years. He provides courses for Maths and Science at Teachoo.