Surface Area Of A Sphere
A sphere is a solid in which all the points on the round surface are equidistant from a fixed point, known as the center of the sphere. The distance from the center to the surface is the radius.
Surface area of a sphere is given by the formula
Surface Area of sphere = 4πr2
where r is the radius of the sphere.
Calculate the surface area of a sphere with radius 2.2 cm
Surface area of sphere
= 4π r2
= 4π (2.2)2
= 4 × 3.14 × 2.2 × 2.2
= 60.79 cm2