Mathematics Part ii Solutions Solutions for Class 7 Math Chapter 7 Number Pictures are provided here with simple step-by-step explanations. These solutions for Number Pictures are extremely popular among class 7 students for Math Number Pictures Solutions come handy for quickly completing your homework and preparing for exams. All questions and answers from the Mathematics Part ii Solutions Book of class 7 Math Chapter 7 are provided here for you for free. You will also love the ad-free experience on Meritnation’s Mathematics Part ii Solutions Solutions. All Mathematics Part ii Solutions Solutions for class 7 Math are prepared by experts and are 100% accurate.
Page No 170:
Question 1:
This picture shows the number of cars produced by a company in various years.
(i) In which year did they make the most number of cars? How many did they make that year?
(ii) In which year did they make the least number? How many?
(iii) How many cars more did they make in 2007 than they made in 2006?
(iv) How many cars did they make altogether in all these four years?
Answer:
(i) The most number of cars were made in the year 2007.
The pictograph shows eight pictures of cars in the year 2007, and each picture represents 10000 cars.
∴ Number of cars made in the year 2007 = 8 × 10000 = 80000
(ii) The least numbers of cars were made in the year 2004.
The pictograph shows three pictures of cars in the year 2004, and each picture represents 10000 cars.
∴ Number of cars made in the year 2004 = 3 × 10000 = 30000
(iii) The pictograph shows eight pictures of cars in the year 2007, and six pictures of cars in the year 2006.
Also, each picture of car represents 10000 cars.
∴ Number of cars made in the year 2007 = 8 × 10000 = 80000
Number of cars made in the year 2006 = 6 × 10000 = 60000
Difference between the numbers of cars made = 80000 − 60000 = 20000
Thus, 20000 more cars were made in the year 2007 than in the year 2006.
(iv) Each picture of a car represents 10000 cars.
The pictograph shows three pictures of cars in the year 2004, four pictures of cars in the year 2005, six pictures of cars in the year 2006 and eight pictures of cars in the year 2007.
Number of cars made in the year 2004 = 3 × 10000 = 30000
Number of cars made in the year 2005 = 4 × 10000 = 40000
Number of cars made in the year 2006 = 6 × 10000 = 60000
Number of cars made in the year 2007 = 8 × 10000 = 80000
Total number of cars made altogether = 30000 + 40000 + 60000 + 80000 = 210000
Page No 171:
Question 1:
Can you draw a pictograph to show the data?
The number of children in various classes of your school.
Answer:
Disclaimer: This question is given to inculcate the habit of teamwork among students. Hence, we have not provided the solution to this question.
Page No 171:
Question 2:
Can you draw a pictograph to show the data?
The number of books each kid in your class read last year.
Answer:
Disclaimer: This question is given to inculcate the habit of teamwork among students. Hence, we have not provided the solution to this question.
Page No 172:
Question 1:
The bar graph below shows the percentage of population at various educational levels in our state according to the 2001 Census of India.
(i) What percent of the population continued to study after higher secondary?
(ii) What percent of population studied only upto Higher Secondary?
(iii) What percent of population studied only upto Upper Primary?
Answer:
(i) The given bar graph shows that 7.5% of the population continued their studies after higher secondary.
(ii) The given bar graph shows that 14.2 % of the population studied only up to higher secondary.
(iii) The given bar graph shows that 44.4 % of the population studied only up to upper primary.
Page No 173:
Question 1:
The table below shows the amount of rainfall in the various districts of Kerala in 2007. Draw a bargraph of this data.
|
District |
Amount of rainfall (cm) |
|
Thiruvananthapuram |
167 |
|
Kollam |
235 |
|
Alappuzha |
265 |
|
Pathanamthitta |
281 |
|
Kottayam |
293 |
|
Idukki |
404 |
|
Ernakulam |
369 |
|
Thrissur |
361 |
|
Palakkad |
300 |
|
Kozhikode |
413 |
|
Malappuram |
327 |
|
Wayanad |
283 |
|
Kannur |
383 |
|
Kasaragod |
361 |
Answer:
By showing the districts of Kerala on the x-axis and the amount of rainfall on the y-axis, we can represent the given data in the form of a bar graph.
Page No 174:
Question 1:
Look at this picture showing the expenses of Anu’s family.
(i) On what single item do they spend the most?
(ii) And the least?
(iii) On which do they spend more, health or education?
Answer:
(i) It can be observed from the pie chart that the area covered by the “others” category of expenses is the largest. However, the question seeks the name of a single item. The next biggest item of expenditure is food.
So, the biggest expenses of Anu’s family are on food.
(ii) It can be observed from the pie chart of expenses of Anu’s family that the smallest area is covered by savings.
So, the smallest amount goes towards savings.
(iii) It can be observed from the pie chart that the area covered by education is larger than the area covered by health.
Thus, Anu’s family spends more on education than on health.
Page No 174:
Question 2:
Look at another picture. It compares the population of the five most populous countries of the world.
(i) Which is the most populous country in the world?
(ii) Where does India stand in terms of population?
(iii) What is the position of the USA?
(iv) Roughly what percent of the world population is the combined population of India and China?
(v) Roughly, how many times the population of USA is the population of India?
Answer:
(i) It can be observed from the pie chart that the largest area is covered by China.
Thus, China is the most populated country in the world.
(ii) It can be observed from the pie chart that India occupies the second-largest area in the chart.
Thus, India is second-most-populated country in the world.
(iii) It can be observed from the pie chart that the USA occupies the fourth-largest area in the chart.
Thus, the USA is fourth-highest-populated country in the world.
(iv) It can be observed from the pie chart that area covered by India and China is approximately two-sixth of the total area of the chart.
Required percentage =
Thus, approximately 33.33% of the world population is the combined population of India and China.
(v) It can be observed from the pie chart that the area covered by the USA is approximately one-third of the area covered by India.
Thus, the population of the USA is roughly one-third of the population of India.
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