Class 6 Exam  >  Class 6 Notes  >  RD Sharma Solutions for Class 6 Mathematics  >  RD Sharma Solutions -Ex-16.2, Understanding Three Dimensional Shapes, Class 6, Maths

Ex-16.2, Understanding Three Dimensional Shapes, Class 6, Maths RD Sharma Solutions | RD Sharma Solutions for Class 6 Mathematics PDF Download

Q.1 Give two new examples of each of the for three-dimensional shapes :

(i) Cone (ii) Sphere (iii) Cylinder (iv) Cuboid (v) Pyramid

Sol.1 :

(i) A school bell and a funnel.

(ii) A tennis ball and a model of a globe.

(iii) Drink cans and delivering pipes for a water and gas.

(iv) A match box and brick.

(v) A paper- weight and a tower like the Eiffel tower.

 

Q.2 What is the shape of :

(i) instrument box

(ii) a brick

(iii) a match box

(iv) a rod- roller

(v) a sweet laddoo

Sol.2 :

(i) My instrument box is in the shape of a cuboid.

(ii) A brick is in the shape of the cuboid.

(iii) A match – box is in the shape of a cuboid.

(iv) A road – roller is in the shape of a cylinder.

(v) A sweet laddoo is shaped like a sphere.

 

OBJECTIVE TYPE QUESTIONS

Q.1. Total number of faces of a cuboid is

(a) 4 (b) 6 (c) 8 (d) 12

Sol. 1 :

(b) 6

 

Q.2.Total number of edges of a cuboid is

(a) 4 (b) 6 (c) 8 (d) 12

Sol.2 :

(d) 6

 

Q.3. Number of faces of a cuboid is

(a) 4 (b) 6 (c) 8 (d) 12

Sol.3 :

(c) 8

 

Q.4. Which one of them is example of cuboid?

(a) a dice (b) a football (c) a gas pipe (d) an ice- cream cone

Sol.4 :

(a) A dice

 

Q.5. A brick is an example of

(a) cube (b)cuboid (c) prism (d) cylinder

Sol.5 :

(b) Cuboid

 

Q.6. A gas pipe is an example of

(a)cone (b)a cylinder (c)cube (d)sphere

Sol.6 :

(b) A cylinder

 

Q.7. If the base radius and height of a right circular cone are 3 cm and 4 cm in lengths, then the slant height is

(a) 5 cm (b) 2 cm (c)25 cm (d)6 cm

Sol.7 :

(a) 5 cm

L =Ex-16.2, Understanding Three Dimensional Shapes, Class 6, Maths RD Sharma Solutions | RD Sharma Solutions for Class 6 MathematicsEx-16.2, Understanding Three Dimensional Shapes, Class 6, Maths RD Sharma Solutions | RD Sharma Solutions for Class 6 Mathematics

 

Q.8. The number of faces of a triangular pyramid is

(a) 3 (b) 4 (c) 6 (d) 8

Sol.8 :

(b) 4

A pyramid is called a triangular pyramid if its base is a triangle.

 

Q.9. The number of edges of a triangular pyramid is

(a) 3 (b) 4 (c) 6 (d) 8

Sol.9 :

(c) 6

 

Q.10. A tetrahedron is a pyramid whose base is a

(a) triangle (b) square (c) rectangle (d) quadrilateral

Sol.10 :

(a) Triangle

The document Ex-16.2, Understanding Three Dimensional Shapes, Class 6, Maths RD Sharma Solutions | RD Sharma Solutions for Class 6 Mathematics is a part of the Class 6 Course RD Sharma Solutions for Class 6 Mathematics.
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FAQs on Ex-16.2, Understanding Three Dimensional Shapes, Class 6, Maths RD Sharma Solutions - RD Sharma Solutions for Class 6 Mathematics

1. What are three-dimensional shapes?
Ans. Three-dimensional shapes, also known as 3D shapes, are solid objects that have length, width, and height. These shapes can be seen and touched from all sides and have volume.
2. What is the difference between two-dimensional and three-dimensional shapes?
Ans. Two-dimensional shapes, also known as 2D shapes, are flat shapes that only have length and width. They can be seen and touched only from one side. On the other hand, three-dimensional shapes have length, width, and height, and can be seen and touched from all sides.
3. Can you give some examples of three-dimensional shapes?
Ans. Yes, some examples of three-dimensional shapes are cubes, spheres, cylinders, cones, pyramids, and prisms. These shapes can be found in our daily life, such as a dice (cube) or a basketball (sphere).
4. How can we calculate the volume of a three-dimensional shape?
Ans. The volume of a three-dimensional shape is calculated by multiplying the area of the base of the shape by its height. For example, to find the volume of a cylinder, we multiply the area of the circle (base) by its height.
5. What is the importance of understanding three-dimensional shapes?
Ans. Understanding three-dimensional shapes is important in various fields such as architecture, engineering, and design. It helps in visualizing and creating objects in a three-dimensional space, which is crucial for building structures, designing products, and solving real-life problems. Additionally, understanding 3D shapes is also fundamental in geometry and spatial reasoning.
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