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Learn in your speed, with individual attention - Teachoo Maths 1-on-1 Class


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Ex 11.3, 3 The height of a cone is 15 cm. If its volume is 1570 cm3, find the radius of the base. (Use π = 3.14) Height of cone = h = 15 cm Let radius of cone = r cm Given Volume of cone = 1570 cm3 1/3 πr2h = 1570 1/3 ×3.14×𝑟2×15=1570 1 ×3.14×𝑟2×5=1570 r2 = 1570/(3.14×5) r2 = 100 r = √100 r = √((10)2) r = 10 cm

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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 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.