# Find the Surface Area of a Sphere of Radius 4.2 cm. - Geometry

Find the surface area of a sphere of radius 4.2 cm. (π=22/7)

#### Solution

Radius (r) of a sphere = 4.2 cm
Surface area of a sphere = 4πr2

=4xx22/7xx(4.2)^2

=221.76cm^2

Thus, the surface area of sphere is 221.76 cm2

Concept: Surface Area of a Combination of Solids
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