JEE (Based on NTA Guidelines-IIT Engg.) Mains Chemistry Coaching Programs

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NCERT Class 9 Solutions: Surface Areas and Volumes (Chapter 13) Exercise 13.8 โ€“ Part 1

Illustration: 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:

  1. Radius of the sphere

    So, Volume of the sphere

    • =
    • =
    • =
    • =
  2. Radius of the sphere

Volume of the sphere

  • =
  • =
  • =

Q-2 Find the amount of water displaced by a solid spherical ball of diameter.

Solution:

  1. Spherical ballีšs diameter is

    Radius

    Amount of water displaced by the spherical ball = Volume of the ball

    • =
    • =
    • =
    • =
  2. The spherical ballีšs 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