Find the surface area and the volume of a beach ball shown in the figure.


Given diameter of ball , d = 42 cm
radius of ball , r = 42/2 = 21cm
Surface area of sphere = 4r2
= 4××212 = 4×3.14×441 = 5538.96 cm2
Volume of sphere = (4/3)r3
= (4/3)××213 = (4/3)×3.14×9261 = 38772.72 cm3
Hence the surface area and volume of ball are 5538.96 cm2 and 38772.72 cm3 respectively.

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