Ex 13.4, 1
Assume = 22/7, unless stated otherwise.
Find the surface area of a sphere of radius:
Radius of sphere = r = 10.5 cm
Surface area of sphere = 4 r2
= (4 22/7 10.5 10.5)cm2
= 1386 cm2
Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.
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