Mathematics

Cylinder

बेलन

In Class 9 Mathematics, the topic Cylinder introduces a solid with two equal circular bases and a curved surface. As part of Surface Area and Volume, students learn to identify its radius, diameter, height, and axis, and use these measurements to calculate the curved surface area, total surface area, and volume. They also practise selecting suitable formulas, keeping units consistent, and applying cylinder measurements to everyday objects such as cans, pipes, tanks, and containers.