NCERT Class 9 Solutions: Surface Areas and Volumes (Chapter 13) Exercise 13.4 – Part 1 (For CBSE, ICSE, IAS, NET, NRA 2022)

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

Solution:

Formula for Calculating the Surface Area of Sphere
  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
  5. () , Surface area
  8. 2
  9. () , Surface area