Surface Areas and Volumes Class 9 Notes
Chapter 13 Surface Areas and Volumes
The NCERT notes chapter on surface area and volume is a valuable resource to help students score well on exams and other competitive exams. In this article, we have provided detailed notes to NCERT Class 9 Math Chapter 13. The NCERT notes presented here are developed based on the latest syllabus and exam guide. These notes are well-researched and reliable information prepared by Vidyakul experts. Once you've gone through the clear notes for area and volume 9th -grade methods provided by our subject experts, you don't need to prepare any formulas.
MATHEMATICS NOTES CLASS 10th CH-13
Points to Remember
To help guide students in their exam preparations for NCERT 9th Maths Chapter 13 Surface Areas and Volumes, we have provided some of the important points to remember below:
If a cuboid has length l, breadth b and height h, then
The surface area of the cuboid = 2 (lb + bh + lh)
Lateral surface area of the cuboid =2 (l + b) × h
Length of a diagonal = √l2+b2+h2
Volume of the cuboid = l × b × h
If the length of each edge of a cube is l, then
Surface area of the cube = 6l2 = 6(Edge)2
Lateral surface area of the cube = 4l2 = 4(Edge)2
Volume of the cube = l3 = (Edge)3
If r is the radius and h is the height of a right circular cylinder, then
Curved (lateral) surface area = 2πrh
Total surface area = 2πr(h+r)
Volume = πr2h
Students can visit Vidyakul to get free access to all the important points for NCERT Class 9 Maths Chapter 13 Surface Areas and Volumes.
Topics and Sub-topics
Area and Volume explain the relationship between the length and width of a figure. For example, a cube is formed from six different rectangles. So, to find the area of ​​a rectangular box, students need to find the areas of all the rectangles. After finding the area of ​​all the faces, they need to add them together, which will give them the surface of the cube. Similarly, students can also find the cross-section of a cylinder. This chapter is full of working examples and exercises. Students need to know the correct formulas and know how to apply them. So, practicing the questions is the best way to master this chapter.
Students can also refer to the table below to check the important topics covered in NCERT Class 9 Maths Chapter 13:
If a cuboid has length l, breadth b and height h, then
The surface area of the cuboid = 2 (lb + bh + lh)
Lateral surface area of the cuboid =2 (l + b) × h
Length of a diagonal = √l2+b2+h2
Volume of the cuboid = l × b × h
If the length of each edge of a cube is l, then
Surface area of the cube = 6l2 = 6(Edge)2
Lateral surface area of the cube = 4l2 = 4(Edge)2
Volume of the cube = l3 = (Edge)3
If r is the radius and h is the height of a right circular cylinder, then
Curved (lateral) surface area = 2πrh
Total surface area = 2πr(h+r)
Volume = πr2h
Learn more about the same in Surface Areas and Volumes Class 9 Notes pdf.
Download this solution for FREE Download this PDF
