NCERT Class 9 Solutions: Surface Areas and Volumes (Chapter 13) Exercise 13.8 – Part 1
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Volume of Sphere
Volume of sphere=4/3 πr^3
Q-1 Find the volume of a sphere whose radius is
Solution:
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Radius of the sphere
So, Volume of the sphere
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=
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=
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=
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=
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Radius of the sphere
Volume of the sphere
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=
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=
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=
Q-2 Find the amount of water displaced by a solid spherical ball of diameter.
Solution:
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Spherical ball’s diameter is
Radius
Amount of water displaced by the spherical ball = Volume of the ball
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=
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=
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=
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=
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The spherical ball’s diameter
Radius
Amount of water displaced by the spherical ball = Volume of the ball
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=
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=
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=
Q-3 The diameter of a metallic ball is. What is the mass of the ball, if the density of the metal is?
Solution:
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Diameter of the ball
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Radius
Volume of the ball
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=
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=
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=
Density of the metal is
Therefore, mass of the ball