Q1 of 26 Page 183

If the length of radius of a sphere is 10.5 cm., let us write by calculating the whole surface area of the sphere.

Given:


The radius of sphere, r = 10.5cm


Formula Used:


The whole surface area of sphere, T.S.A = 4×π×r2


The figure is attached,



⇒ T.S.A = 4×π×(10.5)2


= 1386cm2


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