SCERT KERALA TEXTBOOKS SOLUTIONS & STUDY NOTES: STD VII MATHEMATICS - UNIT 14 Data Pictures - NOTES | Teaching Manual | Teacher Text

Kerala Syllabus Class 7 Mathematics - Unit 14 Data Pictures - Questions and Answers | Teaching Manual 

Questions and Answers for Class 7 Mathematics - Unit 14 Data Pictures - Study Notes | Text Books Solution STD 7 - Maths: Unit 14 Data Pictures - Questions and Answers | ഗണിതം - വിവരച്ചിത്രങ്ങൾ - ചോദ്യോത്തരങ്ങൾ 

ഏഴാം ക്ലാസ്സ്‌  Mathematics - Unit 14 Data Pictures എന്ന പാഠം ആസ്പദമാക്കി തയ്യാറാക്കിയ ചോദ്യോത്തരങ്ങള്‍. ഈ അധ്യായത്തിന്റെ Teachers Handbook, Teaching Manual എന്നിവ ഡൗൺലോഡ് ചെയ്യാനുള്ള ലിങ്ക് ചോദ്യോത്തരങ്ങളുടെ അവസാനം നൽകിയിട്ടുണ്ട്. പുതിയ അപ്‌ഡേറ്റുകൾക്കായി ഞങ്ങളുടെ Telegram Channel ൽ ജോയിൻ ചെയ്യുക.

Kerala Syllabus STD 7 Maths: Unit 14 Data Pictures - Textbook Solutions

♦ Textbook Activities (Textbook Page No: 193)

Food for thought

Pie is a baked dish much popular in western countries:

It is shared by cutting into pieces as in the picture. Hence the name pie chart

♦ Let’s look at another pie chart. The most populous countries of the world are first India, then China and the third the United States of America. The pie chart below shows these and the population of the remaining countries as parts of the total population of the world:

• Approximately what fraction of the world population is that of India?

Answer: ⅙ part

• What about the population of China?

Answer: ⅙ part

• Approximately what fraction of the population of India is that of the USA?

Answer: ⅓ part

• Approximately what fraction of the world population is the combined population of India, China and the USA?

Answer: ⅔ part

The following points are to be borne in mind while drawing a pie chart

• Find out what part of the whole is each number given in the data.

• Each of such parts can be converted into angle measures by multiplying by 360.

• Draw a circle of appropriate size. Then draw a radius. It is good to have it vertical. Measure each angle and draw radii accordingly.

• Each part of the circle can be shaded or coloured to make it attractive.

♦ Textbook Activities (Textbook Page No: 194)

Now try these problems:

(1) The pie chart below shows how the total cultivable land in a panchayat is utilised for different kinds of crops:

(i) For which crop is most of the land used? Approximately what fraction of the total is this?

Answer: Vegetables. Approximately ¼ of the total cultivable land.

(ii) For which crop is the least amount of land used? Approximately what fraction of the total is this?

Answer: Rice. ⅒ of the total cultivable land.

(iii) Approximately what fraction of the total is used for rubber?

Answer: ¼ part

(2) In a class of 40 students, 20 use the school bus, 15 walk to the school and 5 ride bicycles to school. Draw a pie chart showing this.

Answer:

Arriving school by	Number of students	Angle at the centre
School bus	20	²⁰⁄₄₀ x 360° = 180°
Walk	15	¹⁵⁄₄₀ x 360° = 135°
Bicycle	5	⁵⁄₄₀ x 360° = 45°
Total	40

(3)  In a class 25% got A grade in a math test, 40% got B grade, 20% got C grade and the remaining D grade. Draw a pie chart showing this.

Answer:

Grade	Students	Angle at the centre
A	25%	360° x ²⁵⁄₁₀₀ = 90°
B	40%	360 x ⁴⁰⁄₁₀₀ = 144°
C	20%	360 x ²⁰⁄₁₀₀ = 72°
D	15%	360 x ¹⁵⁄₁₀₀ = 54°

👉Class 7 Maths - Teaching Manual - Click here 

👉Class 7 Maths മറ്റ് യൂണിറ്റുകളുടെ ചോദ്യോത്തരങ്ങൾക്കായി ഇവിടെ ക്ലിക്കുക 

👉Class 7 Maths New Teacher Text (pdf) - Click here 

👉Class 7 Maths New Textbooks (Mal & Eng) (pdf) - Click here 

👉Textbooks ഡൗൺലോഡ് ചെയ്യാൻ ഇവിടെ ക്ലിക്കുക.

👉പഴയ SCERT Textbooks കൾ അന്വേഷിക്കുന്നവർക്ക് ഇവിടെ ക്ലിക്ക് ചെയ്യുക

👉Kerala Syllabus New Textbooks - Click here

👉Kerala Syllabus Old Textbooks - Click here

👉സിവിൽ എക്സൈസ് ഓഫീസർ തസ്തികകളുടെ ജോലി സ്വഭാവവുമായി ബന്ധപ്പെട്ട ചോദ്യോത്തരങ്ങൾ

👉പോലീസ് കോൺസ്റ്റബിൾ തസ്തികകളുടെ ജോലി സ്വഭാവവുമായി ബന്ധപ്പെട്ട ചോദ്യോത്തരങ്ങൾ