Question

find the surface area of a sphere of radius 10.5​

Answer 1

Answer:

Step-by-step explanation:

Sphere:

A sphere is a three dimensional figure which is made up of all points in the space which lie at a constant distance from a fixed point called the centre of the sphere and a constant distance is called its radius.

Surface area of sphere:

For a sphere of radius 'r' ,the  surface area is given by

Surface area of sphere=4πr² sq units.

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Solution:

Given:

(i)  Radius of the sphere (r) = 10.5 cm

Surface area of a sphere= 4πr²

= (4 × 22/7 × 10.5 × 10.5)

= 1386 cm²

Answer 2

Answer:

A≈1385.44

Step-by-step explanation:

radius = 10.5

surface area=

A=4πr2=4·π·10.52≈1385.44236