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Ex 13.2, 2 - It is required to make closed cylindrical tank - Area Of Cylinder

Ex 13.2, 2 - Chapter 13 Class 9 Surface Areas and Volumes - Part 2

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Question 2 It is required to make a closed cylindrical tank of height 1 m and base diameter 140 cm from a metal sheet. How many square meters of the sheet are required for the same? Here the cylindrical tank is closed So, we need to find total surface area of cylinder in m2 Height (h) of cylindrical tank = 1 m Base radius (r) of cylindrical tank = /2 = (140/2) cm = 70/100 m Area of sheet required = Total surface area of tank = 2 r(r + h) = 2 22/7 0.7(0.7+1) m2 = 2 22 0.1(1.7) m2 ` = 7.48 m2

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Davneet Singh

Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.