Table of Contents

## Parts of a Cylinder – Curved and Total Surface Area of a Hollow Cylinder

A cylinder is a three-dimensional shape with two circular bases and straight sides. The curved surface area of a cylinder is the area of the curved surface that surrounds the cylinder. The total surface area of a cylinder is the sum of the curved surface area and the two flat surfaces.

## Parts of a Cylinder

- Cylinder base: The bottom of the cylinder. It is circular and has a hole in the center to hold the piston.
- Cylinder barrel: The long, straight part of the cylinder.
- Piston: The part that moves up and down in the cylinder. It has a piston head on one end and a piston rod on the other.
- Cylinder head: The top of the cylinder. It has two holes – one for the spark plug and one for the intake and exhaust valves.

## Curved and Total Surface Area of a Hollow Cylinder

A hollow cylinder is a tube-shaped object with two circular ends. The total surface area of a hollow cylinder is the sum of the curved surface area and the total surface area of the two circular ends.

The curved surface area of a hollow cylinder is the area of the curved surface that surrounds the cylinder. This area can be calculated using the following formula:

A = πr²

where A is the curved surface area, r is the radius of the cylinder, and π is a constant equal to 3.14.

The total surface area of a hollow cylinder is the sum of the curved surface area and the total surface area of the two circular ends. The total surface area of the circular ends can be calculated using the following formula:

A = πr²

where A is the total surface area, r is the radius of the cylinder, and π is a constant equal to 3.14.