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Last updated at March 22, 2023 by Teachoo
Ex 13.4, 1 Assume = 22/7, unless stated otherwise. Find the surface area of a sphere of radius: 10.5 cm Radius of sphere = r = 10.5 cm Surface area of sphere = 4 r2 = (4 22/7 10.5 10.5)cm2 = 1386 cm2