Chapter 11: Surface Areas and Volumes

Class 9 CBSE - Master surface area and volume of cones, spheres, and hemispheres.

About This Chapter

Learn formulas for surface area and volume of cones and spheres. Apply these to solve real-world problems involving 3D shapes.

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Chapter Sections

1

Surface Area of Cone

CSA = πrl, TSA = πr(l+r)

ConeSlant Height
2

Surface Area of Sphere

SA = 4πr²

SphereHemisphere
3

Volume of Cone

V = ⅓πr²h

Volume
4

Volume of Sphere

V = ⁴⁄₃πr³

Sphere Volume
5

Exercise 11.1

Practice problems.
6

Exercise 11.2

Practice problems.
7

Exercise 11.3

Practice problems.
8

Exercise 11.4

Practice problems.
9

Summary

Chapter summary.
10

Enhanced Curriculum Support

Additional resources.