The shape of a glass (tumbler) (see Fig. 12.3) is usually in the form of
a. a cone
b. frustum of a cone
c. a cylinder
d. a sphere

Solution:

From the figure,

A cone is cut through a plane parallel to the base and the cone formed on one side of the plane is removed.

The new part which is left behind on the other side of the plane is the frustum of a cone.

Therefore, the shape of a glass is in the form of a frustum of a cone.

✦ Try This: A plumbline (sahul) is the combination of (see figure)
1. a cone and a cylinder
2. a hemisphere and a cone
3. frustum of a cone and a cylinder
4. sphere and cylinder

We know that

Which is

= Hemisphere + Cone

= Hemisphere and a cone

Therefore, a plumbline (sahul) is the combination of a hemisphere and a cone.

☛ Also Check: NCERT Solutions for Class 10 Maths Chapter 13

NCERT Exemplar Class 10 Maths Exercise 12.1 Problem 4

The shape of a glass (tumbler) (see Fig. 12.3) is usually in the form of a. a cone, b. frustum of a cone, c. a cylinder, d. a sphere

Summary:

The shape of a glass (tumbler) (see Fig. 12.3) is usually in the form of a frustum of a cone

☛ Related Questions:

• The shape of a gilli, in the gilli-danda game (see Fig. 12.4), is a combination of a. two cylinders . . . .
• A shuttle cock used for playing badminton has the shape of the combination of a. a cylinder and a sp . . . .
• A cone is cut through a plane parallel to its base and then the cone that is formed on one side of t . . . .