Question

curved surface area and total surface area of gol gumbaz

Answer 1

Gol gumbaz is in the shape of circular

Hence we will talk about CSA and TSA of circular shape which is a cylindrical shape

What is the surface area of ​​the cylinder?

The surface area of ​​a cylinder can be defined as the amount of space covered by the flat surface of the cylinder base and the curved surface of the cylinder. The total area of ​​the cylinder includes the area of ​​the 2 bases of the cylinder, which are in the shape of a circle, and the area of ​​the curved surface. Surface area is expressed in square units such as square centimeters, square inches, square feet, etc. A cylinder is a 3D solid object that consists of two circular bases connected by a curved surface.

Curved cylinder surface

The curved surface area of ​​the formula cylinder

Curved surface of cylinder = 2πrh

where,

r = radius of the cylinder

h = cylinder height

π = 22/7 or 3.14

The total area of ​​the cylinder

Total area of ​​cylinder = area of ​​two bases + area of ​​curved surface. Since the bases of the cylinder are circular in shape, their combined area will be π$r^2$ + π$r^2$.

Total area of ​​cylinder ⇒ (π$r^2$ + π$r^2$) + 2πrh

⇒ 2π$r^2$ + 2πrh

Total surface area of ​​cylinder = 2πr(r+h)

where,

r = radius of the cylinder

h = cylinder height

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