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Example 7 - Find the height of a cylinder whose radius is 7 cm and

Example 7 - Chapter 11 Class 8 Mensuration - Part 2


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Example 7 Find the height of a cylinder whose radius is 7 cm and the total surface area is 968 γ€–π‘π‘šγ€—^2. Given, Radius of Cylinder = 7 cm Total surface area = 968 cπ‘š^2 Let Height of Cylinder = h Total Surface Area = 968 m2 2πœ‹π‘Ÿ(π‘Ÿ+β„Ž) = 968 2Γ—22/7Γ—7Γ—(7+β„Ž) = 968 2Γ—22(7+β„Ž) = 968 44Γ—(7+β„Ž) = 968 7+β„Ž = 968/44 7+β„Ž = 484/22 7+β„Ž = 242/11 7+β„Ž = 22 β„Ž = 22βˆ’7 β„Ž = 15 cm ∴ . The height of the cylinder is 15 cm.

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.