Find here step-by-step NCERT Solutions Exercise 9.4 Class 6 Maths Chapter 9 Data Handling [ Drawing Bar Graphs ].

**Prerequisite / Revise:**

## NCERT Solutions Exercise 9.4 Class 6 Maths | Data Handling

Problems in Exercise 9.4 Class 6 Maths require the knowledge of Drawing Bar Graphs.

A suitable SCALE to represent one unit of the data variable is choosen for the graph. e.g., 1 unit = 100 students.

Data variables with equal spacing and their values are plotted on rectangular axes (axes at 90°).

In horizontal bar graph – Data Variables on horizontal axis and their values on vertical axis.

In vertical bar graph – Data Variables on vertical axis and their values on horizontal axis.

Bars of equal width and length corresponding to their values are then drawn on data variables.

## Exercise 9.4

Drawing Bar Graphs

**QUESTION 1**

A survey of 120 school students was done to find which activity they prefer to do in their free time.

Draw a bar graph to illustrate the above data taking scale of 1 unit

length = 5 students.

Which activity is preferred by most of the students other than playing?

**ANSWER**

Above data can be illustrated through a bar graph as following:

Reading story books is preferred by most of the students other than playing.

**QUESTION 2**

The number of Mathematics books sold by a shopkeeper on six consecutive days is shown below :

Draw a bar graph to represent the above information choosing the scale of your choice.

**ANSWER**

Above information can be represented by a bar graph as following:

Scale on the graph – 1 unit length = 10

**QUESTION 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.

(a) In which year were the maximum number of bicycles manufactured?

(b) In which year were the minimum number of bicycles manufactured?

**ANSWER**

Given data can be illustrated through a bar graph as following:

(a) Maximum number of bicycles were manufactured in the year 2002,

(b) Minimum number of bicycles were manufactured in the year 1999.

**QUESTION 4**

Number of persons in various age groups in a town is given in the following table.

Draw a bar graph to represent the above information and answer the following questions.

(take 1 unit length = 20 thousands)

(a) Which two age groups have 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?

**ANSWER**

Above information can be represented by a bar graph as following:

(a) Age groups 30-44 and 45-59 have same population,

(b) Number of senior citizens = Sum of number of persons in age group of 60-74 and 75 and above

= 80,000 + 40,000

= 1,20,000

Thus, number of senior citizens in the town = 1,20,000.

## NCERT SOLUTIONS CLASS 6 MATHS CHAPTER 9 DATA HANDLING

Check NCERT Solutions of other exercises from Class 6 Maths Chapter 9 Data Handling by clicking the links given below.

• Exercise 9.1

• Exercise 9.2

• Exercise 9.3

• Exercise 9.4

We hope Ncert Solutions Exercise 9.4 Class 6 Maths has helped you understand how to draw Bar Graphs.

Write in the comment section for any error or any solution related queries from the exercise. [ NCERT Solutions Exercise 9.4 Class 6 Maths ]