#### Question

Find the surface area of a sphere of radius 10.5 cm

`["Assume "pi=22/7]`

#### Solution

Radius (*r*) of sphere = 10.5 cm

Surface area of sphere = 4π*r*^{2}

`=[4xx22/7xx(10.5)^2]cm^2`

`=(4xx22/7xx10.5xx10.5)cm^2`

= (88 x 1.5 x 10.5)cm^{2}

= 1386 cm^{2}

Therefore, the surface area of a sphere having radius 10.5cm is 1386 cm^{2}.

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Solution Find the surface area of a sphere of radius 10.5 cm Concept: Surface Area of a Sphere.