Rd Sharma 2020 2021 Solutions for Class 7 Maths Chapter 24 Data Handling Iii Construction Of Bar Graphs are provided here with simple stepbystep explanations. These solutions for Data Handling Iii Construction Of Bar Graphs are extremely popular among Class 7 students for Maths Data Handling Iii Construction Of Bar Graphs Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Rd Sharma 2020 2021 Book of Class 7 Maths Chapter 24 are provided here for you for free. You will also love the adfree experience on Meritnationâ€™s Rd Sharma 2020 2021 Solutions. All Rd Sharma 2020 2021 Solutions for class Class 7 Maths are prepared by experts and are 100% accurate.
Page No 24.5:
Question 1:
Two hundred students of class VI and VII were asked to name their favourate colours so as to decide upon what should be the colour of their school house. The results are shown in the following table.
Colour:  Red  Green  Blue  Yellow  Orange 
Number of students:  43  19  55  49  34 
(i) Which is the most preferred colour and which is the least?
(ii) How many colours are there in all?
Answer:
Mark the horizontal axis OX as “Name of the Colour” and the vertical axis OY as “Number Of Students”.

Along the horizontal axis OX, choose bars of uniform (equal) width, with a uniform gap between them.

Choose a suitable scale to determine the heights of the bars, according to the space available for the graph. Here, we choose 1 small division to represent 10 student.
(i) The most preferred colour is blue and the least preferred is green.
(ii) In all, there are 5 colours.
Page No 24.6:
Question 2:
Following data gives total marks (out of 600) obtained by six children of a particular class.
Student:  Ajay  Bali  Dipti  Faiyaz  Gotika  Hari 
Marks obtained:  450  500  300  360  400  540 
Answer:

Mark the horizontal axis OX as “Name of the Students” and the vertical axis OY as “Marks Obtained”.

Along the horizontal axis OX, choose bars of uniform (equal) width, with a uniform gap between them.

Choose a suitable scale to determine the heights of the bars,according to the space available for the graph.Here, we choose 1 small division to represent 100 marks.
Page No 24.6:
Question 3:
Number of children in six different classes are given below. Represent the data on a bar graph.
Class:  V  VI  VII  VIII  IX  X 
Number of children:  135  120  95  100  90  80 
(ii) Which class has the maximum number of children?
(iii) Which class has the minimum number of children?
Answer:

Mark the horizontal axis OX as “Class ” and the vertical axis OY as “Number of Children”.

Along the horizontal axis OX, choose bars of uniform (equal) width, with a uniform gap between them.

Choose a suitable scale to determine the heights of the bars,according to the space available for the graph.Here, we choose 1 big division to represent 40 children.
(i) We choose 1 big to represent 40 children.
(ii)The maximum number of students are in class V.
(iii) The minimum number of students are in class X.
Page No 24.6:
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:
Subject:  English  Hindi  Maths  Science  S.Science 
1^{st} term:  67  72  88  81  73 
2^{nd} term:  70  65  95  85  75 
(ii) Has the performance gone down in any subject?
Answer:
We choose 1 small division to represent 1 child in the graph.

Mark the horizontal axis OX as “Subject” and the vertical axis OY as “Marks”.

Along the horizontal axis OX, choose bars of uniform (equal) width, with a uniform gap between them.

Choose a suitable scale to determine the heights of the bars,according to the space available for the graph. Here, we choose 1 big division to represent 10 marks.
(i) In Maths, the students showed their greatest improvement.
(ii) The students performed worst in Hindi.
Page No 24.6:
Question 5:
Consider the following data gathered from a survey of a colony:
Favourate Sport:  Cricket  BasketBall  Swimming  Hockey  Athletics 
Watching  1240  470  510  423  250 
Participating  620  320  320  250  105 
(i) Which sport is most popular?
(ii) What is more preferred watching or participating in sports?
Answer:

Mark the horizontal axis OX as “Favourite Sports” and the vertical axis OY as “Number of People”.

Along the horizontal axis OX, choose bars of uniform (equal) width, with a uniform gap between them.

Choose a suitable scale to determine the heights of the bars,according to the space available for the graph.Here, we choose 2 big division to represent 400 people .
(i) Cricket is the most popular sport.
(ii) Watching is preferred over participation.
Page No 24.6:
Question 6:
The production of saleable steel in some of the steel plants of our country during 1999 is given below:
Plant  Bhilai  Durgapur  Rourkela  Bokaro 
Production (In thousand tonnes) 
160  80  200  150 
Answer:

Mark the horizontal axis OX as “Name of the Steel Plant” and the vertical axis OY as “Production (in thousand tonnes)”.

Along the horizontal axis OX, choose bars of uniform (equal) width,with a uniform gap between them.

Choose a suitable scale to determine the heights of the bars,according to the space available for the graph.Here, we choose 1 big division to represent 20 thousand tonnes.
Page No 24.7:
Question 7:
The following data gives the number (in thousands) of applicants registered with an Employment Exchange during, 19952000:
Year  1995  1996  1997  1998  1999  2000 
Number of applicants registered (in thousands)  18  20  24  28  30  34 
Answer:

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

Along the horizontal axis OX, choose bars of uniform (equal) width, with a uniform gap between them.

Choose a suitable scale to determine the heights of the bars, according to the space available for the graph. Here, we choose 1 big divisions to represent 4 thousand applicants.
Page No 24.7:
Question 8:
The following table gives the route length (in thousand kilometres) of the Indian Railways in some of the years:
Year  196061  197071  198081  199091  20002001 
Route length (in thousand kilometres) 
56  60  61  74  98 
Answer:

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

Along the horizontal axis OX, choose bars of uniform (equal) width, with a uniform gap between them.

Choose a suitable scale to determine the heights of the bars, according to the space available for the graph. Here, we choose 1 big division to represent 1000 Km.
Page No 24.7:
Question 9:
The following data gives the amount of loans (in crores of rupees) disbursed by a bank during some years:
Year  1992  1993  1994  1995  1996 
Loan (in crores of rupees)  28  33  55  55  80 
(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.
Answer:

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

Along the horizontal axis OX, choose bars of uniform (equal) width, with a uniform gap between them.

Choose a suitable scale to determine the heights of the bars, according to the space available for the graph. Here, we choose 1 big division to represent 10 crore of rupees.
In 1995, the loan amount was not increased over that of the preceding year.
Page No 24.7:
Question 10:
The following table shows the interest paid by a company (in lakhs):
Year  199596  199697  199798  199899  19992000 
Interest (in lakhs of rupees) 
20  25  15  18  30 
Answer:

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

Along the horizontal axis OX, choose bars of uniform (equal) width, with a uniform gap between them.

Choose a suitable scale to determine the heights of the bars, according to the space available for the graph. Here, we choose 1 big divisions to represent 5 lakhs rupees.
Page No 24.7:
Question 11:
The following data shows the average age of men in various countries in a certain year:
Country  India  Nepal  China  Pakistan  U.K.  U.S.A. 
Average age (in years)  55  52  60  50  70  75 
Answer:

Mark the horizontal axis OX as “Countries” and the vertical axis OY as “Average Age of men (in years)”.

Along the horizontal axis OX, choose bars of uniform (equal) width, with a uniform gap between them.

Choose a suitable scale to determine the heights of the bars, according to the space available for the graph. Here, we choose 1 big division to represent 10 year.
Page No 24.7:
Question 12:
The following data gives the production of foodgrains (in thousand tonnes) for some years:
Year  1995  1996  1997  1998  1999  2000 
Production (in thousand tonnes) 
120  150  140  180  170  190 
Answer:

Mark the horizontal axis OX as “Years” and the vertical axis OY as “Production of foodgrains (in thousand tonnes)”.

Along the horizontal axis OX, choose bars of uniform (equal) width, with a uniform gap between them.

Choose a suitable scale to determine the heights of the bars, according to the space available for the graph.Here, we choose 1 big division to represent 20 thousand tonnes.
Page No 24.8:
Question 13:
The following data gives the amount of manure (in thousand tonnes) manufactured by a company during some years:
Year  1992  1993  1994  1995  1996  1997 
Manure (in thousand tonnes) 
15  35  45  30  40  20 
(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
Answer:

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

Along the horizontal axis OX, choose bars of uniform (equal) width, with a uniform gap between them.

Choose a suitable scale to determine the heights of the bars, according to the space available for the graph. Here, we choose 1 big divisions to represent 5 thousand tonnes.
(iii) 1996 and 1997.
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