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:

1. Radius of the sphere (r)

   Surface area

2. Radius of the sphere (r)

   Surface area

3. 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

   • ²

3. ()

   Surface area