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Right Circular Cone Experiment Class 10 Maths Practical NCERT

The experiment to determine Right Circular Cone are part of the Class 10 Maths Lab Manual provides practical activities and experiments to help students understand mathematical concepts effectively. It encourages interactive learning by linking theoretical knowledge to real-life applications, making mathematics enjoyable and meaningful.

Maths Lab Manual Class 10 CBSE Right Circular Cone Experiment

Determine Right Circular Cone Class 10 Practical

Objective
To make a cone of given slant height and the circumference of circular base from circular portion experimentally.

Prerequisite Knowledge

  1. Circumference of the circle.
  2. Concept of sector of a circle.
  3. Concept of pythagoras theorem.

Materials Required
Coloured chart papers, a pair of scissors, cello tape, geometry box.

Procedure

  1. Draw and cut a circle from a coloured chart paper of radius equal to the given slant height say ‘l’ of the cone.
    NCERT Class 10 Maths Lab Manual - Right Circular Cone 1
  2. Mark a sector OAB such that major AB = circumference of the base of cone. i.e, if rbe the radius of cone then length of major arc AB =2πr.
  3. Cut the sector AOB.
  4. Fold the remaining paper by bringing the two radii OA and OB together.
    NCERT Class 10 Maths Lab Manual - Right Circular Cone 2

Observation
When two radii are joined together, a cone is formed.
NCERT Class 10 Maths Lab Manual - Right Circular Cone 3

Result
A cone of given slant height and circumference of base can be made experimentally.

Learning Outcome
Students will learn how to make a cone of given slant height and circumference of base from the sector of a circle. They will also learn how the radius of the circle becomes the slant height of the cone and the arc length of the circle becomes the circumference of the base of the cone.

Activity Time

  1. Find x.
    NCERT Class 10 Maths Lab Manual - Right Circular Cone 4
  2. Find x.
    NCERT Class 10 Maths Lab Manual - Right Circular Cone 5
  3. Find x.
    NCERT Class 10 Maths Lab Manual - Right Circular Cone 6
  4. Make a right circular cone of given slant height 13 cm and base radius 5 cm. Also find its height by measurement and by calculation.

You can also download NCERT Solution Class 10 Maths to help you to revise complete syllabus and score more marks in your examinations.

Viva Voce

Question 1.
How many vertices are there in a right circular cone ?
Answer:
One

Question 2.
What is the relation between radius of base, height of cone and slant height of cone ?
Answer:
l2 = r2 + h2, where l = slant height, r = radius, h = height.

Question 3.
What are different parts of a cone ?
Answer:
Circular base, vertex, curved surface

Question 4.
Give two examples of a right circular cone.
Answer:
Birthday cap, cone of ice cream

Question 5.
If the height of a cone is equal to the radius of base of the cone, then find the slant height of the cone
Answer:
Slant height = √2 x Height of cone

Question 6.
What is the slant height of a cone ?
Answer:
It is the distance of the vertex from any point on the base (circumference of circle).

Question 7.
What is the curved surface area of a cone ?
Answer:
πrl, where r = radius of cone, l = slant height of the cone.

Question 8.
What is the volume of a cone ?
Answer:
\(\frac { 1 }{ 3 }\) πr2h, where r = radius of cone and h = height of cone.

Multiple Choice Questions

Question 1.
Radius of the base of a cone is 5 cm and slant height is 13 cm. Then height of the cone is
(a) 12 cm
(b) 8 cm
(c) 18 cm
(d) none of these

Question 2.
If the height of the cone is 6 cm and the radius of its base is 8 cm, then slant height is
(a) 2 cm
(b) 10 cm
(c) 14 cm
(d) none of these

Question 3.
If the height and slant height of a cone are 3 cm and 5 cm respectively, then the radius of its base is
(a) 2 cm
(b) 8 cm
(c) 4 cm
(d) none of these

Question 4.
Volume of a cone of height 9 cm is 4871 cm3. The diameter of its base is
(a) 8 cm
(b) 9 cm
(c) 4.5 cm
(d) none of these

Question 5.
A conical pit of top diameter 3.5 m is 12 m deep. What is the capacity in kilolitre ?
(a) 38.5 kl
(b) 3.85 kl
(c) 385 kl
(d) none of these

Question 6.
A right triangle ABC with side 5 cm, 12 cm and 13 cm is revolved about the side 12 cm. What is the volume of the solid so obtained ? [Take π = 3.14]
(a) 314 cm3
(b) 341 cm3
(c) 143 cm3
(d) none of these

Question 7.
Find the volume of a conical bucket as shown in the fig.
NCERT Class 10 Maths Lab Manual - Right Circular Cone 7
(a) 37.7 cm3
(b) 37 cm3
(c) 36.7 cm3
(d) 36 cm3

Question 8.
Radius of the base of a cone is 3 cm and slant height is 5 cm. The height of the cone is
(a) 3 cm
(b) 4 cm
(r) 5 cm
(d) 4.1cm

Question 9.
Diameter of the base of a cone is 10.5 cm and its slant height is 10 cm. Its curved surface area is
(a) 165 cm2
(b) 156cm2
(c) 160 cm2
(d) 150 cm2

Question 10.
Find the total surface area of a cone if its slant height is 21 m and diameter of its base is 24 cm.
(a) 1244.57 m2
(b) 1442.57 m2
(c) 1440.57 m2
(d) 1441.57m2

Answers

  1. (a)
  2. (b)
  3. (c)
  4. (a)
  5. (a)
  6. (a)
  7. (a)
  8. (b)
  9. (a)
  10. (a)

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NCERT Class 10 Maths Lab Manual 

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