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in Mensuration by (47.6k points)
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Find the surface area and the volume of a beach ball shown in the figure.

1 Answer

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Best answer

Given: For the spherical ball, 

diameter (d) = 42 cm 

To find: Surface area and volume of the beach ball. 

Radius (r) = d/2 = 42/2 = 21 cm 

Surface area of sphere= 4πr2 

= 4 × 3.14 × (21)2 

= 4 × 3.14 × 21 × 21 

= 5538.96 cm2 

Volume of sphere = 4/3 πr3 

= 4/3 × 3.14 × (21)3 

= 4 × 3.14 × 7 × 21 × 21 

= 38772.72 cm3

∴ The surface area and the volume of the beach ball are 5538.96 cm2 and 38772.72 cm3 respectively.

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