## Surface Areas and Volumes Formulas for CBSE Class 9 Maths - Free PDF Download

## FAQs on CBSE Class 9 Maths Chapter 13 - Surface Areas and Volumes Formulas

1. What are the two types of surface areas of three dimensional objects?

Surface area is the space occupied by the surface or in other words it is the total covering area of the surface on a three dimensional object. Surface areas are of two types: Total surface area and Curved surface area.

Total surface area is the area covered by all the surfaces of an object which includes all its base(s). Curved Surface Area is also known as Lateral Surface Area is the area of all the curved surfaces of an object except the area of all its base(s).

2. How is volume different from surface area?

Volume is the capacity of an object or a container. The object can either be solid or hollow. To find the volume of the three dimensional object one has to to the length, breadth and height of the object. Surface area is the covering of the three dimensional object. To find the surface area also one has to know the length, breadth and height of the object. The difference is that the volume deals with the inside capacity of the object whereas surface area deals with the outer covering area of the object. Volume of an object is always more than the surface area. Volume is represented by cube and surface area is represented by square.

3. What are the topics covered in the chapter 13 of class 9 Maths?

Chapter 13 of class 9 Maths discusses the surface area of different three dimensional objects such as cube, cuboid, right circular cylinder, right circular cone and sphere. Similarly, the chapter speaks about the method of finding the volume of cube, cuboid, right circular cylinder, right circular cone and sphere.

4. How to study chapter 13 of class 9 Maths?

The best way to study the chapter surface areas and volumes is by first understanding the concept and definition of surface area and volume and also by knowing the specifications of different three dimensional objects. Then, the next step is to learn all the formulas. For better understanding it is advisable to understand the derivations of the formulas but the derivation is not important for exams. Once the concept and formula is known, you can proceed with solving the numerical problems from basic to advance level.