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Ex 13.8, 7 - Find volume of a sphere whose surface area - Ex 13.8

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Ex 11.4, 7 Find the volume of a sphere whose surface area is 154 cm2 Let radius of the sphere = r cm Given, Surface area = 154 cm2 4 r2 = 154 4 22/7 r2 = 154 r2 = (154 7)/(4 22) r2 = 12.25 r = 12.25 r = 3.5 cm Volume of sphere = 4/3 r3 = (4/3 22/7 3.5 3.5 3.5) cm3 = 179.67 cm3

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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.