RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Read RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph below, students should study RD Sharma class 7 Mathematics available on Studiestoday.com with solved questions and answers. These chapter wise answers for class 7 Mathematics have been prepared by teacher of Grade 7. These RD Sharma class 7 Solutions have been designed as per the latest NCERT syllabus for class 7 and if practiced thoroughly can help you to score good marks in standard 7 Mathematics class tests and examinations

Exercise 24.1

 

Question :1. Two hundred students of class VI and VII were asked to name their favorite colours so as to decide upon what should be the colour of their school house. The results are shown in the following table.

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Represent the given data on a bar graph.

(i) Which is the most preferred colour and which is the least?

(ii) How many colours are there in all? 

Solution 1:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Construction of bar graph:

1. Name the colour on the horizontal axis OX, and the number of students on the vertical axis OY.

2. Choose bars of uniform (equal) width with a uniform distance between them along the horizontal axis OX.

3. Determine the heights of the bars using an appropriate scale based on the amount of space available for the graph. We've chosen one small division to serve 10 students in this case. 

(i) Blue is the most preferred colour and green is the least preferred.

(ii) There are 5 colours.

 

Question :2. Following data gives total marks (out of 600) obtained by six children of a particular class.

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Represent the data by a bar graph 

Solution 2:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Construction of bar graph:

1. Label the horizontal axis OX with the students' names and the vertical axis OY with the marks earned.

2. Select bars of uniform (equal) width with a uniform distance between them along the horizontal axis OX.

3. Calculate the heights of the bars using a suitable scale based on the amount of space available for the graph. We've chosen one small division to represent 100 marks in this case.

 

Question :3. Number of children in six different classes are given below. Represent the data on a bar graph.

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

(i) How do you choose the scale.

(ii) Which class has the maximum number of children?

(iii) Which class has the minimum number of children? 

Solution 3:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Construction of bar graph:

1. Label the horizontal axis OX as Class and the vertical axis OY as Number of Children.

2. Choose bars of uniform (equal) width with a uniform distance between them along the horizontal axis OX.

3. Determine the heights of the bars using an appropriate scale based on the amount of space available for the graph. Here, we choose 1 big division to represent 40 children. 

(i) To represent 40 children, we chose one big.

(ii)Class V has the largest number of students.

(iii) Class X has the minimum of students.

 

Question :4. The performance of students in 1st term and 2nd term is as given below. Draw a double bar graph choosing appropriate scale and answer the following:

 RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

(i) In which subject, has the children improved their performance the most? 

(ii) Has the performance gone down in any subject?  

Solution 4:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Construction of bar graph:

1. Label the vertical axis OY as Marks and the horizontal axis OX as Subject.

2. Select uniform (equal) width bars with a uniform distance between them along the horizontal axis OX.

3. Determine the heights of the bars using an appropriate scale based on the graph's available space. We've chosen one large division to reflect 10 points. 

(i) In Maths, the students showed their greatest improvement.

(ii) in Hindi, the students showed their worst performance.

 

Question :5. Consider the following data gathered from a survey of a colony:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Draw a double bar graph choosing an appropriate scale. What do you infer from the bar graph?

(i) Which sport is most popular?

(ii) What is more preferred watching or participating in sports? 

Solution 5:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Construction of graph:

1. Mark the vertical axis OY as Number of People and the horizontal axis OX as Favorite Sports.

2. Select bars of uniform (equal) width with a uniform distance between them along the horizontal axis OX.

3. Calculate the heights of the bars using a suitable scale based on the amount of space available for the graph. We chose two large divisions to serve 400 people in this case. 

(i) Most popular sport is the Cricket.

(ii) Participation is favored over watching.

 

Question :6. The production of saleable steel in some of the steel plants of our country during 1999 is given below:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Construct a bar graph to represent the above data on a graph paper by using the scale 1 big division = 20 thousand tonnes. 

Solution 6:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Construction of graph:

1. Mark the vertical axis OY as Output and the horizontal axis OX as Name of the Steel Plant (in thousand tonnes).

2. Select bars of uniform (equal) width with a uniform distance between them along the horizontal axis OX.

3. Calculate the heights of the bars using a suitable scale based on the amount of space available for the graph. We've chosen one large division to cover 20,000 tonnes.

 

Question :7. The following data gives the number (in thousands) of applicants registered with an Employment Exchange during, 1995-2000:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Construct a bar graph to represent the above data. 

Solution 7:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Steps of constructing graph:

1. Mark the vertical axis OY as Number of Applicants Registered and the horizontal axis OX as Years (in thousands).

2. Select bars of uniform (equal) width with a uniform distance between them along the horizontal axis OX.

3. Calculate the heights of the bars using a suitable scale based on the amount of space available for the graph. We've chosen one large division to represent the 4000 applicants.

 

Question :8. The following table gives the route length (in thousand kilometres) of the Indian Railways in some of the years:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Represent the above data with the help of a bar graph. 

Solution 8:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Construction of graph:

1. Mark the vertical axis OY as Route Length and the horizontal axis OX as Years (in thousand kilometres).

2. Select bars of uniform (equal) width with a uniform distance between them along the horizontal axis OX.

3. Calculate the heights of the bars using a suitable scale based on the amount of space available for the graph. We've chosen one large division to denote 10000 kilometres.

 

Question :9. The following data gives the amount of loans (in crores of rupees) disbursed by a bank during some years:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

(i) Represent the above data with the help of a bar graph. 

(ii) With the help of the bar graph, indicate the year in which amount of loan is not increased over that of the preceding year. 

Solution 9:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Construction of graph:

1. Mark the vertical axis OY as Loan and the horizontal axis OX as Years (in crores of rupees).

2. Select bars of uniform (equal) width with a uniform distance between them along the horizontal axis OX.

3. Calculate the heights of the bars using a suitable scale based on the amount of space available for the graph. We'll use one major division to reflect ten crores of rupees in this example. 

(ii) The loan volume was not raised in 1995 compared to the previous year.

 

Question :10. The following table shows the interest paid by a company (in lakhs):

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Draw the bar graph to represent the above information. 

Solution 10:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph


Construction of graph:

1. Mark the vertical axis OY as Interest and the horizontal axis OX as Years (in lakhs of rupees).

2. Select bars of uniform (equal) width with a uniform distance between them along the horizontal axis OX.

3. Calculate the heights of the bars using a suitable scale based on the amount of space available for the graph. To reflect 5 lakhs rupees, we chose one large division.

 

Question :11. The following data shows the average age of men in various countries in a certain year:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Represent the above information by a bar graph. 

Solution 11:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph


Steps of constructing graph:

1. Mark the vertical axis OY as Average Age of Men and the horizontal axis OX as Countries (in years).

2. Select bars of uniform (equal) width with a uniform distance between them along the horizontal axis OX.

3. Calculate the heights of the bars using a suitable scale based on the amount of space available for the graph. We've chosen one large division to cover ten years.

 

Question :12. The following data gives the production of food grains (in thousand tonnes) for some years:

 RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Represent the above data with the help of a bar graph. 

Solution 12:


RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

 

Construction of bar graph: 

Make the horizontal axis OX represent years and the vertical axis OY represent food grain production (in thousand tonnes). 

2. Select bars of uniform (equal) width with a uniform distance between them along the horizontal axis OX. 

3. Calculate the heights of the bars using a suitable scale based on the amount of space available for the graph. We've chosen one large division to cover 20,000 tonnes. 

 

Question :13. The following data gives the amount of manure (in thousand tonnes) manufactured by a company during some years:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

(i) Represent the above data with the help of bar graph.

(ii) Indicate with the help of the bar graph the year in which the amount of manure manufactured by the company was maximum.

(iii) Choose the correct alternative:

The consecutive years during which there was maximum decrease in manure production are:

(a) 1994 and 1995 (b) 1992 and 1993

(c) 1996 and 1997 (d) 1995 and 1996 

Solution 13:

RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph

Construction of graph:

1. Mark the vertical axis OY as Manure and the horizontal axis OX as Years (in thousand tonnes).

2. Select bars of uniform (equal) width with a uniform distance between them along the horizontal axis OX.

3. Calculate the heights of the bars using a suitable scale based on the amount of space available for the graph. We've chosen one large division to cover 5,000 tonnes. 

(ii) In 1994, the amount of manure produced by the company was at its peak.

(iii) The years 1996 and 1997.

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RS Aggarwal Class 7 Mathematics Solutions Chapter 1 Integers
RS Aggarwal Class 7 Mathematics Solutions Chapter 2 Fractions
RS Aggarwal Class 7 Mathematics Solutions Chapter 3 Decimals
RS Aggarwal Class 7 Mathematics Solutions Chapter 4 Rational Numbers
RS Aggarwal Class 7 Mathematics Solutions Chapter 5 Exponents
RS Aggarwal Class 7 Mathematics Solutions Chapter 6 Algebraic Expressions
RS Aggarwal Class 7 Mathematics Solutions Chapter 7 Linear Equations in One Variable
RS Aggarwal Class 7 Mathematics Solutions Chapter 8 Ratio and Proportion
RS Aggarwal Class 7 Mathematics Solutions Chapter 9 Unitary Method
RS Aggarwal Class 7 Mathematics Solutions Chapter 10 Percentage
RS Aggarwal Class 7 Mathematics Solutions Chapter 11 Profit and Loss
RS Aggarwal Class 7 Mathematics Solutions Chapter 12 Simple Interest
RS Aggarwal Class 7 Mathematics Solutions Chapter 13 Lines and Angles
RS Aggarwal Class 7 Mathematics Solutions Chapter 14 Properties of Parallel Lines
RS Aggarwal Class 7 Mathematics Solutions Chapter 15 Properties of Triangles
RS Aggarwal Class 7 Mathematics Solutions Chapter 16 Congruence
RS Aggarwal Class 7 Mathematics Solutions Chapter 17 Constructions
RS Aggarwal Class 7 Mathematics Solutions Chapter 18 Reflection and Rotational Symmetry
RS Aggarwal Class 7 Mathematics Solutions Chapter 19 Three-Dimensional Shapes
RS Aggarwal Class 7 Mathematics Solutions Chapter 20 Mensuration
RS Aggarwal Class 7 Mathematics Solutions Chapter 21 Collection and Organisation of Data
RS Aggarwal Class 7 Mathematics Solutions Chapter 22 Bar Graph
RS Aggarwal Class 7 Mathematics Solutions Chapter 23 Probability
RD Sharma Solutions Class 7 Maths
RD Sharma Solutions Class 7 Chapter 1 Integers
RD Sharma Solutions Class 7 Chapter 2 Fraction
RD Sharma Solutions Class 7 Chapter 3 Decimals
RD Sharma Solutions Class 7 Chapter 4 Rational Numbers
RD Sharma Solutions Class 7 Chapter 5 Operation on Decimal Numbers
RD Sharma Solutions Class 7 Chapter 6 Exponents
RD Sharma Solutions Class 7 Chapter 7 Algebraic Expressions
RD Sharma Solutions Class 7 Chapter 8 Linear Equations in One Variable
RD Sharma Solutions Class 7 Chapter 9 Ratio and Proportion
RD Sharma Solutions Class 7 Chapter 10 Unitary Method
RD Sharma Solutions Class 7 Chapter 11 Percentage
RD Sharma Solutions Class 7 Chapter 12 Profit and Loss
RD Sharma Solutions Class 7 Chapter 13 Simple Interest
RD Sharma Solutions Class 7 Chapter 14 Line and Angles
RD Sharma Solutions Class 7 Chapter 15 Properties of Triangle
RD Sharma Solutions Class 7 Chapter 16 Congruence
RD Sharma Solutions Class 7 Chapter 17 Constructions
RD Sharma Solutions Class 7 Chapter 18 Symmetry
RD Sharma Solutions Class 7 Chapter 19 Visualising Solid Shapes
RD Sharma Solutions Class 7 Chapter 20 Mensuration Perimeter and Area of Rectilinear Figures
RD Sharma Solutions Class 7 Chapter 21 Mensuration Area of Circle
RD Sharma Solutions Class 7 Chapter 22 Data Handling Collection and Organisation of Data
RD Sharma Solutions Class 7 Chapter 23 Data Handling Central Values
RD Sharma Solutions Class 7 Chapter 24 Data Handling Constructions of Bar Graph
RD Sharma Solutions Class 7 Chapter 25 Data Handling Probability
RS Aggarwal Class 7 Mathematics Solutions
RS Aggarwal Class 7 Mathematics Solutions Chapter 1 Integers
RS Aggarwal Class 7 Mathematics Solutions Chapter 2 Fractions
RS Aggarwal Class 7 Mathematics Solutions Chapter 3 Decimals
RS Aggarwal Class 7 Mathematics Solutions Chapter 4 Rational Numbers
RS Aggarwal Class 7 Mathematics Solutions Chapter 5 Exponents
RS Aggarwal Class 7 Mathematics Solutions Chapter 6 Algebraic Expressions
RS Aggarwal Class 7 Mathematics Solutions Chapter 7 Linear Equations in One Variable
RS Aggarwal Class 7 Mathematics Solutions Chapter 8 Ratio and Proportion
RS Aggarwal Class 7 Mathematics Solutions Chapter 9 Unitary Method
RS Aggarwal Class 7 Mathematics Solutions Chapter 10 Percentage
RS Aggarwal Class 7 Mathematics Solutions Chapter 11 Profit and Loss
RS Aggarwal Class 7 Mathematics Solutions Chapter 12 Simple Interest
RS Aggarwal Class 7 Mathematics Solutions Chapter 13 Lines and Angles
RS Aggarwal Class 7 Mathematics Solutions Chapter 14 Properties of Parallel Lines
RS Aggarwal Class 7 Mathematics Solutions Chapter 15 Properties of Triangles
RS Aggarwal Class 7 Mathematics Solutions Chapter 16 Congruence
RS Aggarwal Class 7 Mathematics Solutions Chapter 17 Constructions
RS Aggarwal Class 7 Mathematics Solutions Chapter 18 Reflection and Rotational Symmetry
RS Aggarwal Class 7 Mathematics Solutions Chapter 19 Three-Dimensional Shapes
RS Aggarwal Class 7 Mathematics Solutions Chapter 20 Mensuration
RS Aggarwal Class 7 Mathematics Solutions Chapter 21 Collection and Organisation of Data
RS Aggarwal Class 7 Mathematics Solutions Chapter 22 Bar Graph
RS Aggarwal Class 7 Mathematics Solutions Chapter 23 Probability