The important steps to be followed in the construction of bar graphs are the main topics discussed under NCERT Solutions for Class 6 Maths Chapter 9 Data Handling Exercise 9.4. The students can self analyse their knowledge about the concepts by solving problems using NCERT Solutions Class 6 Maths designed by expert faculty at BYJU’S. They can also understand the shortcut methods and formulas, which are important while answering questions.
NCERT Solutions For Class 6 Maths Chapter 9 Data Handling Exercise 9.4
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Access NCERT Solutions for Class 6 Maths Chapter 9: Data Handling Exercise 9.4
1. A survey of 120 school students was done to find which activity they prefer to do in their free time.
| Preferred Activity | Number of Students |
| Playing | 45 |
| Reading story books | 30 |
| Watching T.V | 20 |
| Listening to music | 10 |
| Painting | 15 |
Draw a bar graph to illustrate the above data taking a scale of 1 unit length = 5 students. Which activity is preferred by most of the students other than playing?
Solutions:
By taking a scale of 1 unit length = 5 students, the bar graph is shown below considering the above data:
Reading storybooks is the activity preferred by most of the students, other than playing.
2. The number of Mathematics books sold by a shopkeeper on six consecutive days is shown below:
| Days | Sunday | Monday | Tuesday | Wednesday | Thursday | Friday |
| Number of books sold | 65 | 40 | 30 | 50 | 20 | 70 |
Draw a bar graph to represent the above information choosing the scale of your choice.
Solutions:
By taking a scale of 1 unit length = 10 books, we can draw a bar graph of the above data as follows:
3. Following table shows the number of bicycles manufactured in a factory during the years 1998 to 2002. Illustrate this data using a bar graph. Choose a scale of your choice
| Year | Number of Bicycles Manufactured |
| 1998 | 800 |
| 1999 | 600 |
| 2000 | 900 |
| 2001 | 1100 |
| 2002 | 1200 |
(a) In which year was the maximum number of bicycles manufactured?
(b) In which year was the minimum number of bicycles manufactured?
Solutions:
By taking a scale of 1 unit length = 100 bicycles, we can draw a bar graph of the above data as follows:
(a) In the year 2002, the maximum number of bicycles were manufactured, i.e. 1200 bicycles.
(b) In the year 1999, the minimum number of bicycles were manufactured, i.e. 600 bicycles.
4. Number of persons in various age groups in a town is given in the following table.
| Age Group
(in years) |
1-14 | 15-29 | 30-44 | 45-59 | 60-74 | 75 and above |
| Number of Persons | 2 lakhs | 1 lakh 60 thousand | 1 lakh 20 thousand | 1 lakh 20 thousand | 80 thousand | 40 thousand |
Draw a bar graph to represent the above information and answer the following questions. (take 1 unit length = 20 thousand)
(a) Which two age groups have the same population?
(b) All persons in the age group of 60 and above are called senior citizens. How many senior citizens are there in the town?
Solutions:
By taking a scale of 1 unit length = 20 thousand, we can draw a bar graph of the above data as follows:
(a) The two age groups which have the same population are 30-44 and 45-59.
(b) Senior citizens are the persons between the age group either from 60-74 or 75 and above.
Therefore, the number of senior citizens in the town = 80000 + 40000
= 1 lakh 20 thousand
Hence, the number of senior citizens in the town is 1 lakh 20 thousand.
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