If a solid sphere of radius 10 cms is moulded into 8 spherical solid balls of equal radius, then surface area of each ball (in sq.cm) is ?
4/3 π x 10 x 10 x 10 = 8 x 4/3 π x r x r x rr = 54π x 5 x 5 = 100π
Find the surface area (in cm2) of a sphere of diameter 28 cm.
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