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NCERT Class 9 Solutions: Surface Areas and Volumes (Chapter 13) Exercise 13.8 โ Part 1
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 ballีs diameter is
Radius
Amount of water displaced by the spherical ball = Volume of the ball
- =
- =
- =
- =
- The spherical ballีs 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