R d sharma solutions mathematics class 7 Solutions for Chapter 24 data handling construction of bar graphs

Exercises in Chapter 24 data handling construction of bar graphs Grade 7

Data Handling-Construction Of Bar Graphs Exercise 24.1

Questions in Data Handling-Construction Of Bar Graphs Exercise 24.1

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

Represent the data by a bar graph

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

(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?

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

Subjects	English	Hindi	Maths	Science	S.Science
1st Term	67	72	88	81	73
2nd Term	70	65	95	85	75

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

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

Consider the following data gathered from a survey of a colony:

Favourite sport	Cricket	Basket - Ball	Swimming	Hockey	Athletics
Watching	1240	470	510	423	250
Participating	620	320	320	350	105

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

(i) Which sport is the most popular?

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

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

Construct a bar graph to represent the above data on a graph paper by using the scale.

1 big division = 20 thousand tonnes.

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

Year	1995	1996	1997	1998	1999	2000
Number of Applicants Registered(in Thousands)	18	20	24	28	30	34

Construct a Bar Graph to represent the above data.

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

Year	1960-61	1970-71	1980-81	1990-91	2000-01
Route length (in thousand kilometres)	56	60	61	74	98

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

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

(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.

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

Year	1995-96	1996-97	1997-98	1998-99	1999-00
Interest (in lakhs of rupees)	20	25	15	18	30

Draw the bar graph to represent the above information.

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

Country	India	Nepal	China	Pakistan	UK	USA
Average age (in years)	55	52	60	50	70	75

Represent the above information by a bar graph.

The following data gives the production of food grains (in thousand tonnes) fo some years:

Year	1995	1996	1997	1998	1999	2000
Production( in thousand tonnes)	120	150	140	180	170	190

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

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

(i) Represent the above data with the help of a 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 a maximum decrease in manure production are:

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

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Chapters in this book

Integers

Fractions

Decimals

Rational Numbers

Operations on Rational Numbers

Exponents

Algebraic Expressions

Linear Equations In One Variable

Ratio and Proportion

Unitary Method

Percentage

Profit and Loss

Simple Interest

Lines and Angles

Properties of Triangle

Congruence

Constructions

Symmetry

Visualising Solid Shapes

Mensuration 1

Mensuration 2 Area of Circle

Data Handling-Collection Organisation Data

Data Handling-Central Values

Data Handling-Construction Of Bar Graphs

Data Handling-Probability