Surface Area & Volume Class 9 Free Notes Maths Chapter 13 | class 9 Surface Area & Volume notes | Edugrown

CBSE Class 9 Maths Notes Chapter 13 Surface Area & Volume Pdf free download is part of Class 9 Maths Notes for Quick Revision. Here we have given NCERT Class 9 Maths Notes Chapter 13 Surface Area & Volume. According to new CBSE Exam Pattern, MCQ Questions for Class 9 Maths Carries 20 Marks.

Class 9 Construction Notes

NCERT Class 9 Notes becomes a vital resource for all the students to self-study from NCERT textbooks carefully. That is why we have arranged every important points given in the chapter and simplified them so you can easily understand every point clearly. Through these notes a student can boost their preparation and assessment of understood concepts. It is quite easy to retain the answers once you are fully aware of the concept thus notes can be beneficial for you. As you already know the importance of NCERT textbooks for Class 9 thus these NCERT Notes is prove very useful during the preparation of exams. 

Quick Revision Notes of Ch-13 Surface Area & Volume Class 9th Maths.

• The bodies occupying space are called solids, such as a cuboid, a cube, a cylinder, a cone, a sphere, etc. These solids have plane or curved surfaces.
• The outer surface of a cuboid is made up of six rectangles. If we take the length of the cuboid as ℓ, breadth as b and the height as h, then Surface area of a cuboid = 2[lb + bh + hl]
• The cuboid whose length, breadth and height are equal is called a cube. Let each edge of the cube be ‘a’, then Surface area of a cube = 6a²

Formula for Cuboid

Curved Surface Area for Cuboid or Area of four walls = 2(bh + hl)  = 2(l + b) × h 

Total Surface Area for Cuboid = 2(lb + bh + hl)Volume for Cuboid = l×b×h

Formula for Cube

Curved Surface Area for Cube or Area of four walls = 4l² 

Total Surface Area for Cube = 6l² Volume for Cube = l³

Formula for Right Circular Cylinder

Curved Surface Area for Right Circular Cylinder = 2πrh  

Total Surface Area for Right Circular Cylinder = 2πr(r + h) 

Volume for Right Circular Cylinder = πr²h

Formula for Right Circular Cone

Slant height of right Circular Cone: 

Curved Surface Area for Right Circular Cone = πrl  

Total Surface Area for Right Circular Cone = πr(r + l) 

Volume for Right Circular Cone = 1/3 (πr²h) 

Formula for Sphere

Curved Surface Area for Sphere = 2πrh  

Total Surface Area for Sphere = 2πr(r + h) 

Volume for Sphere = πr²h

Formula for Hemisphere

Curved Surface Area for Hemiphere = 4πr²   

Total Surface Area for Hemiphere = 4πr²

Volume for Hemiphere = 4/3(πr³)

Tips and Notes

• Area × Rate = Cost
• Density = Mass/Volume
• 1 m³ = 1000 litres
• 1 L = 1000 cm²
• Speed = Distance/Time
• 1 km = 1000 m = 10⁵ cm
• 1 km² = 10⁶ m²
• 1 m = 100 cm
• 1 m² = 10000 cm²
• 1 km/hr = 5/18 m/sec
• 1 km/hr = 50/3 m/min
• Shape of the river = cuboid