Question 8 - Area Of Cylinder - Chapter 11 Class 9 Surface Areas and Volumes

Last updated at April 16, 2024 by

Ex 13.2, 8 - In a hot water heating system, there is a - Area Of Cylinder

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Question 8 In a hot water heating system, there is a cylindrical pipe of length 28 m and diameter 5 cm. Find the total radiating surface in the system. [ = 22/7] The cylindrical pipe radiates from the curved surface & not from the ends So, we need to find curved surface area of cylinder Height (h) of cylindrical pipe = 28 m Radius (r) of circular end of pipe = 5/2 cm = 2.5 cm r = 2.5 1/100 m Total radiating surface in the system = CSA of cylindrical pipe = 2 rh = (2 22/7 0.025 28) m2 = 4.4 m2

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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, Social Science, Physics, Chemistry, Computer Science at Teachoo.