NCERT Class 9 Solutions: Surface Areas and Volumes (Chapter 13) Exercise 13.8 – Part 1
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Volume of Sphere
Q-1 Find the volume of a sphere whose radius is
Solution:
Radius of the sphere
So, Volume of the sphere
=
=
=
=
Radius of the sphere
Volume of the sphere
=
=
=
Q-2 Find the amount of water displaced by a solid spherical ball of diameter.
Solution:
Spherical ball’s diameter is
Radius
Amount of water displaced by the spherical ball = Volume of the ball
=
=
=
=
The spherical ball’s diameter
Radius
Amount of water displaced by the spherical ball = Volume of the ball
=
=
=
Q-3 The diameter of a metallic ball is. What is the mass of the ball, if the density of the metal is?
Solution:
Diameter of the ball
Radius
Volume of the ball
=
=
=
Density of the metal is
Therefore, mass of the ball