# Complete Lesson on Area of Cylinder

Before we delve into the surface area of a cylinder, let’s evaluate a cylinder. A cylindrical tube is a three-dimensional figure with two circular bases parallel to each other and a rounded surface area in geometry. In this blog let’s learn more about area of cylinder.

## Find Area of Cylinder

The surface area of a cylindrical tube is the sum of the two parallel and consistent round faces and the curved surface area.

This short article will talk about just how to locate the total area and the lateral extent of a cylindrical tube.

To compute a cylinder area, you require to locate the Base Area (B) and Curved Surface (CSA). Thus, a cylinder’s area or surface amounts to the sum of the base area times two and the area of the bent surface.

The curved surface area of a cylinder is equal to a rectangular shape whose size is 2πr, and also width is h.

Where r = radius of the circular face and also h = elevation of the cylinder.

The area of the rounded surface area = Location of a rectangular shape =l x w = πdh

The base location, B = Area of a circle = πr2

The Location of a cylindrical tube formula

The formula for the complete surface area of a cylinder is provided as:

Complete area of a Area of Cylinder = 2πr2 + 2πrh

TSA = 2πr2 + 2πrh

Where 2πr2 is the top and lower circular face area, and 2πrh is the area of the rounded surface area.

By taking 2πr as a common factor from RHS, we get;

TSA = 2πr (h + r) … … … … … … … … …( Surface of a cyndrical tube formula).

Let’s resolve instance issues involving the surface of a cylinder.

#### Example.

Find the overall surface area of a cylinder whose distance is 5 centimetres and also the height is 7 cm.

Solution.

By the formula,

TSA = 2πr (h + r).

= 2 x 3.14 x 5( 7 + 5).

and, = 31.4 x 12.

= 376.8 cm2.

Lateral Area of a Cylinder.

As specified, the area of the rounded surface of a cylinder is what is termed as the side area. In easy words, the side surface area of a cylindrical tube is the area of a cylinder leaving out the Location of the base and the bottom (circular surface).

The formula offers the lateral area of a cylindrical tube.

LSA = 2πrh.

Example 5.

Find the later surface area of a cylinder whose size is 56 centimetres and elevation, which is 20 centimetres.

Option.

Offered.

Size = 56 centimeters, therefore radius, r =56/2 = 28 cm.

Elevation, h = 20 cm.

By, the formula.

LSA = 2πrh.

= 2 x 3.14 x 28 x 20.

= 3516.8 cm2.

Hence, the lateral area of the cylinder is 3516.8 cm2.