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

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**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.

**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 =

**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

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