NCERT Class 9 Solutions: Surface Areas and Volumes (Chapter 13) Exercise 13.4 – Part 1
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Q1 . Find the surface area of a sphere of radius:
Solution:

Radius of the sphere (r)
Surface area


Radius of the sphere (r)
Surface area


Radius of the sphere (r)
Surface area
Q2 Find the surface area of a sphere of diameter:
Solution:

()
Surface area


()
Surface area



^{2}


()
Surface area