Surface Area and Volume of a Sphere

Does sphere comes under two-dimensional geometry or three-dimensional geometry?

Sphere comes under the category of three-dimensional geometry.

If we are given the radius of a sphere, then find the diameter of the sphere.

To find the diameter of a sphere, we use the formula,

Diameter = 2 × Radius of Sphere

Can we find radius of sphere if we are given the surface area value of the sphere?

Yes, we can calculate the radius of sphere if the surface area of the sphere is given.

Find surface area of solid hemissphere which have radius = 4 cm.

To calculate the surface area of a solid hemisphere we use the formula, Surface Area = 3πr²

Surface Area = 3 × 3.14 × 4 × 4

= 48 × 3.14 = 150.72 cm²

Find radius of a sphere whose surface area is 154 cm².

To calculate radius of a sphere we use the formula, Surface Area = 4πr²

⇒ 154 = 4 × 3.14 × r × r

⇒ r×r = 12.26

⇒ r = 3.5 cm

In this article, we are going to study about an important chapter of school mathematics. This article will explain concepts related to the sphere and solve questions and unsolved questions.