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.