NCERT Class 9 Solutions: Surface Areas and Volumes (Chapter 13) Exercise 13.4 – Part 1

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Q-1 . Find the surface area of a sphere of radius:

Solution:

Formula for calculating the surface area of sphere.

Surface Area of a Sphere

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  1. Radius of the sphere (r)

Surface area

  • Radius of the sphere (r) , Surface area

  • Radius of the sphere (r) , Surface area

Q-2 Find the surface area of a sphere of diameter:

Solution:

  1. (), Surface area

  2. (), Surface area

  3. 2

  4. (), Surface area