Rs Aggarwal 2020 2021 Solutions for Class 7 Maths Chapter 22 Bar Graphs are provided here with simple step-by-step explanations. These solutions for Bar Graphs are extremely popular among Class 7 students for Maths Bar Graphs Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Rs Aggarwal 2020 2021 Book of Class 7 Maths Chapter 22 are provided here for you for free. You will also love the ad-free experience on Meritnationâ€™s Rs Aggarwal 2020 2021 Solutions. All Rs Aggarwal 2020 2021 Solutions for class Class 7 Maths are prepared by experts and are 100% accurate.

#### Page No 276:

#### Answer:

We can draw the bar graph by following the given steps:

Step 1.- On a graph paper, draw a horizontal line OX as* x*-axis and vertical line OY as *y*-axis.

Step 2.- Along OX, write the names of the subjects at the points that are taken at a uniform gap.

Step 3.- Choose the scale:

1 big division = 10 marks

1 small division = 1 mark

Step 4.- Heights of the various bars are:

Hindi = 43 small divisions = 4 big divisions and 3 small divisions

English = 56 small divisions = 5 big divisions and 6 small divisions

Maths = 80 small divisions = 8 big divisions

Science = 65 small divisions = 6 big divisions and 5 small divisions

Social Science = 50 small divisions = 5 big divisions

Step 5.- Draw bars of equal width on the *x-*axis. The difference between the two bars should also be the same.

#### Page No 276:

#### Answer:

We can draw the bar graph by following the given steps:

Step 1.- On a graph paper, draw a horizontal line OX as *x*-axis and vertical line OY as *y*-axis.

Step 2.- Along OX, write the names of the sports at the points that are taken at a uniform gap.

Step 3.- Choose the scale:

1 big division = 10 students

1 small division = 1 student

Step 4.- Heights of the various bars:

Cricket = 75 small divisions = 7 big divisions and 5 small divisions

Football = 35 small divisions = 3 big divisions and 5 small divisions

Tennis = 50 small divisions = 5 big divisions

Badminton = 25 small divisions = 2 big divisions and 5 small divisions

Swimming = 65 small divisions = 6 big divisions and 5 small divisions

Step 5.- Draw bars of equal width on the *x-*axis. The difference between the two bars should also be the same.

#### Page No 276:

#### Answer:

We can draw the bar graph by following the given steps:

Step 1.- On a graph paper, draw a horizontal line OX as *x*-axis and vertical line OY as *y-*axis.

Step 2.- Along OX, write the years at the points that are taken at a uniform gap.

Step 3.- Choose the scale:

1 big division = 100 students

1 small division = 10 student

Step 4.- Heights of the various bars:

2011-2012 = 80 small divisions = 8 big divisions

2012-2013 = 97.5 small divisions = 9 big divisions and 7.5 small divisions

2013-2014 = 110 small divisions = 11 big divisions

2014-2015 = 140 small divisions = 14 big divisions

2015-2016 = 162.5 small divisions = 16 big divisions and 2.5 small divisions

Step 5.- Draw bars of equal width on the *x-*axis. The difference between the two bars should also be the same.

We get the following bar graph:

#### Page No 276:

#### Answer:

We can draw the bar graph by following the given steps:-

Step 1.- On a graph paper, draw a horizontal line OX as *x*-axis and vertical line OY as *y*-axis.

Step 2.- Along OX, write the years at the points that are taken at a uniform gap.

Step 3.- Choose the scale:

1 big division = 2000 scooters

1 small division = 200 scooters

Step 4.- Heights of the various bars:

2011 = 55 small divisions = 5 big divisions and 5 small divisions

2012 = 70 small divisions = 7 big divisions

2013 = 62.5 small divisions = 6 big divisions 2.5 small divisions

2014 = 87.5 small divisions = 8 big divisions and 7.5 small divisions

2015 = 75 small divisions = 7 big divisions and 5 small divisions

2016 = 120 small divisions = 12 big divisions

Step 5.- Draw bars of equal width on the *x-*axis. The difference between the two bars should also be the same.

We get the following bar graph:

#### Page No 277:

#### Answer:

We can draw the bar graph by following the given steps:

Step 1.- On a graph paper, draw a horizontal line OX as *x*-axis and vertical line OY as *y*-axis.

Step 2.- Along OX, write the names of the countries at the points that are taken at a uniform gap.

Step 3.- Choose the scale:

1 big division = 5 unit

2 small division = 1 unit

Step 4.- Heights of the various bars:

China = 84 small divisions = 8 big divisions and 4 small divisions

India = 70 small divisions = 7 big divisions

Germany = 28 small divisions = 2 big divisions and 8 small divisions

U.K. = 56 small divisions = 5 big divisions and 6 small divisions

Sweden = 42 small divisions = 4 big divisions and 2 small divisions

Step 5.- Draw bars of equal width on the *x-*axis. The difference between the two bars should also be the same.

We get the following bar graph:

#### Page No 277:

#### Answer:

The graph obtained is as follows:

#### Page No 277:

#### Answer:

We can draw the bar graph by following the given steps:

Step 1.- On a graph paper, draw a horizontal line OX as *x*-axis and vertical line OY as *y-*axis.

Step 2.- Along OX, write the years at the points that are taken at a uniform gap.

Step 3.- Choose the scale:

1 big division = 10 thousand crore rupees

1 small division = 1 thousand crore rupees

Step 4.- Heights of the various bars:

1998−99 = 70 small divisions = 7 big divisions

1999−2000 = 84 small divisions = 8 big divisions and 4 small divisions

2000−2001 = 98 small divisions = 9 big divisions and 8 small divisions

2001−2002 = 106 small divisions = 10 big divisions and 6 small divisions

2002−2003 = 120 small divisions = 12 big divisions

Step 5.- Draw bars of equal width on the *x-*axis. The difference between the two bars should also be the same.

We get the following bar graph:

#### Page No 277:

#### Answer:

We can draw the bar graph by following steps:

Step 1.- On a graph paper, draw a horizontal line OX as *x*-axis and vertical line OY as *y-*axis.

Step 2.- Along OX, write the names of the cities at the points that are taken at a uniform gap.

Step 3.- Choose the scale:

1 big division = 100 km

1 small division = 10 km

Step 4.- Heights of the various bars:

Kolkata = 134 small divisions = 13 big divisions and 4 small divisions

Mumbai = 110 small divisions = 11 big divisions

Chennai = 170 small divisions = 17 big divisions

Hyderabad = 122 small divisions = 12 big divisions and 2 small divisions

Step 5.- Draw bars of equal width on the *x-*axis. The difference between the two bars should also be the same.

We get the following bar graph:

#### Page No 277:

#### Answer:

We can draw the bar graph by following the given steps:

Step 1.- On a graph paper, draw a horizontal line OX as *x-*axis and vertical line OY as *y*-axis.

Step 2.- Along OX, write the names of the countries at the points that are taken at a uniform gap.

Step 3.- Choose the scale:

1 big division = 10 years

1 small division = 1 year

Step 4.- Heights of the various bars:

Japan = 76 small divisions = 7 big divisions and 6 small divisions

India = 57 small divisions = 5 big divisions and 7 small divisions

Britain = 70 small divisions = 7 big divisions

Ethiopia = 43 small divisions = 4 big divisions and 3 small divisions

Cambodia = 36 small divisions = 3 big divisions and 6 small divisions

Step 5.- Draw bars of equal width on the *x-*axis. The difference between the two bars should also be the same.

We get the following bar graph:

#### Page No 277:

#### Answer:

We can draw the bar graph by following steps:

Step 1.- On a graph paper, draw a horizontal line OX as *x*-axis and vertical line OY as *y*-axis.

Step 2.- Along OX, write the years at the points that are taken at a uniform gap.

Step 3.- Choose the scale:

1 big division = 20 thousand crore rupees

1 small division = 2 thousand crore rupees

Step 4.- Heights of the various bars:

2001−02 = 74 small divisions = 7 big divisions and 4 small divisions

2002−03 = 88 small divisions = 8 big divisions and 8 small divisions

2003−04 = 102 small divisions = 10 big divisions and 2 small divisions

2004−05 = 116 small divisions = 11 big divisions and 6 small divisions

2005−06 = 90 small divisions = 9 big divisions

Step 5.- Draw bars of equal width on the *x-*axis. The difference between the two bars should also be the same.

We get the following bar graph:

#### Page No 277:

#### Answer:

We can draw the bar graph by following the given steps:

Step 1- On a graph paper, draw a horizontal line OX as *x*-axis and vertical line OY as *y*-axis.

Step 2- Along OX, write the names of the months at the points taken at a uniform gap.

Step 3- Choose the scale:

1 big division = 5 cm

2 small divisions = 1 cm

Step 4- Heights of the various bars:

June = 50 small divisions = 5 big divisions

July = 60 small divisions = 6 big divisions

August = 80 small divisions = 8 big divisions

September = 40 small divisions = 4 big divisions

October = 20 small divisions = 2 big divisions

November = 10 small divisions = 1 big division

Step 5- Draw bars of equal width on the *x-*axis. The difference between the two bars should also be the same.

We get the following bar graph:

#### Page No 277:

#### Answer:

We can draw the bar graph by following the given steps:

Step 1.- On a graph paper, draw a horizontal line OX as *x-*axis and vertical line OY as *y*-axis.

Step 2.- Along OX, write the names of the brands at the points that are taken at a uniform gap.

Step 3.- Choose the scale:

1 big division = 5%

2 small divisions = 1%

Step 4.- Heights of the various bars:

A = 90 small divisions = 9 big divisions

B = 50 small divisions = 5 big divisions

C = 30 small divisions = 3 big divisions

D = 20 small divisions = 2 big divisions

Others = 10 small divisions = 1 big division

Step 5.- Draw bars of equal width on the *x-*axis. The difference between the two bars should also be the same.

We get the following bar graph:

#### Page No 277:

#### Answer:

We can draw the bar graph by following the given steps:

Step 1- On a graph paper, draw a horizontal line OX as *x-*axis and vertical line OY as *y*-axis.

Step 2- Along OX, write the names of the week at the points that are taken at a uniform gap.

Step 3- Choose the scale:

1 big division = Rs 500

1 small division = Rs 50

Step 4- Heights of the various bars:

First week = 170 small divisions = 17 big divisions

Second week = 175 small divisions = 17 big divisions and 5 small divisions

Third week = 181 small divisions = 18 big divisions and 1 small division

Fourth week = 185 small divisions = 18 big divisions and 5 small divisions

Step 5- Draw bars of equal width on the *x-*axis. The difference between the two bars should also be the same.

We get the following bar graph:

#### Page No 278:

#### Answer:

We can draw the bar graph by following the given steps:

Step 1- On a graph paper, draw a horizontal line OX as *x*-axis and vertical line OY as *y*-axis.

Step 2- Along OX, write the names of the modes of transport at the points taken at a uniform gap.

Step 3- Choose the scale:

1 big division = 50 students

1 small division = 5 student

Step 4- Heights of the various bars:

School bus = 128 small divisions = 12 big divisions and 8 small divisions

Private bus = 72 small divisions = 7 big divisions and 2 small divisions

Bicycle = 98 small divisions = 9 big divisions and 8 small divisions

Rickshaw = 42 small divisions = 4 big divisions and 2 small divisions

By foot = 30 small divisions = 3 big divisions

Step 5- Draw the bars of equal width* *on* x*-axis. The difference between the two bars should also be the same.

We get the following bar graph:

#### Page No 278:

#### Answer:

(i) The bar graph shows the marks obtained by a student in an examination in various subjects.

(ii) The student is very good in mathematics.

(iii) The student is poor in Hindi.

(iv) Marks scored in English = 60

Marks scored in Hindi = 35

Marks scored in mathematics = 75

Marks scored in social science = 50

Marks scored in science = 60

∴ Average marks = $\frac{60+35+75+50+60}{5}=\frac{280}{5}=56$

#### Page No 278:

#### Answer:

(i) The bar graph shows the number of members in each of the 85 families.

(ii) 40 families have three members each.

(iii) Number of people living alone = 85 − (5+40+25+15)

= 85 − 85

= 0

(iv) The most common family is that with three members.

Each such family has three members .

#### Page No 279:

#### Answer:

(i) Mount Everest is the highest peak and it's height is 8800 m.

(ii) Height of the highest peak, Mount Everest = 8800 m

Height of the second highest peak, Kanchenjunga = 8200 m

Ratio = $\frac{8800}{8200}=\frac{44}{41}=44:41$

(iii) Heights of the peaks are 6000 m, 8000 m, 7500 m, 8200 m and 8800 m.

Heights in descending order:

8200 m, 8000 m, 7500 m, 6000 m

#### Page No 279:

#### Answer:

(i)

(ii) On Tuesday the number os readers in the library were maximum = 400 + 450 =850

(iii) Mean nnumber of magazine readers = $\frac{200+450+300+250+100+50}{6}=\frac{1350}{6}=225$

#### Page No 279:

#### Answer:

(i) Maximaum number of students are in Class VI

(ii) Ratio = $\frac{85}{90}=\frac{17}{18}$

(iii) Percentage of class IX absent =$\frac{6}{75}\times 100=8$%

#### Page No 280:

#### Answer:

(i) Maximum sunlight in Aberdeen is during June (8 hours)

(ii) Minimum sunlight in Margate is during January (1.5 hours)

#### Page No 280:

#### Answer:

(i)

(ii) Maximum population growth was in Town A

(iii) Least population growth in Town D

#### Page No 280:

#### Answer:

(i) Minimum temperature for the monts of Nov, Dec, Jan and Feb of 2015 and 2016 have been compared.

(ii) Ratio of minimum temperature in 2015 to minimum temperature in 2016 during the month of Nov = $\frac{18}{14}=\frac{9}{7}$

$\Rightarrow \mathrm{Ratio}=9:7$

(iii) In November and February the minimum temperature in 2015 was greater than that of 2016.

(iv) Average minimum temperature for the year 2016 = $\frac{14+13+8+9}{4}=\frac{44}{4}=11$º^{ }C

(v) November variation = 18 − 14 = 4

December variation = 13 − 11 = 2

January variation = 8 − 5 = 3

February variation = 11 − 9 = 2

During November the variation in two temperatures is maximum.

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