Answer :
Diameter of spherical ball, d = 42 cm
Radius of ball, r =21 cm
As we know that, Surface area of sphere, A = 4πr2
⇒ A = 4× (3.14) × (21)2
⇒ A = 5538.96 sq.cm
Also,
⇒ V = 38772.72 cm3
∴ The surface area and volume of the spherical ball is 5538.96 cm2 and 38772.72 cm3 respectively
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