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Question
Find the surface area and the volume of a beach ball shown in the figure.
Solution
Radius of the beach ball, r = \[\frac{42}{2}\] = 21 cm
Surface area of the beach ball, S = \[4\pi r^2 = 4 \times 3 . 14 \times \left( 21 \right)^2\] = 5538.96 cm2
Volume of the beach ball, V = \[\frac{4}{3}\pi r^3 = \frac{4}{3} \times 3 . 14 \times \left( 21 \right)^3\] = 38772.72 cm3
Thus, the surface area and volume of the beach ball are 5538.96 cm2 and 38772.72 cm3, respectively.
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