Class 8 Mathematics Chapter 3: Proportional Reasoning-2 — practice questions with answers
Free practice for Class 8 Mathematics, Chapter 3: Proportional Reasoning-2. Try the solved questions below, then take a free test with instant marking and explanations.
42 questions17 easy, 19 medium, 6 hardNCERT · CBSE · State boards
Sample questions with solutions
Q1. Viswanath mixed 6 cups of rice with 3 cups of urad dal. Is this proportional to 2 : 1?
- Yes — 6 : 3 simplifies to 2 : 1
- No
- Only if he adds water
- Cannot tell
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Answer: A. Yes — 6 : 3 simplifies to 2 : 1
Why: Both quantities changed by a factor of 3. [p.55]
Why: Both quantities changed by a factor of 3. [p.55]
Q2. A map shows RF 1 : 60,00,000. What does this mean?
- 1 cm on the map represents 60,00,000 cm on the ground
- 1 km on the map is 60 km
- The map is 60 lakh times bigger
- Nothing about distance
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Answer: A. 1 cm on the map represents 60,00,000 cm on the ground
Why: RF = Representative Fraction. [p.56]
Why: RF = Representative Fraction. [p.56]
Q3. A ratio on a map comparing map distance with ground distance is called the Representative ______.
Show answer
Answer: Fraction
Why: Written as RF. [p.56]
Why: Written as RF. [p.56]
Q4. Purple paint uses Red : Blue : White = 2 : 3 : 5. With 10 L white, how many litres of blue are needed?
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Answer: 6 (± 0)
Why: 1 part = 2 L, so blue = 3 × 2 = 6 L. [p.58]
Why: 1 part = 2 L, so blue = 3 × 2 = 6 L. [p.58]
Q5. How is the angle of each slice of a pie chart decided?
- It is proportional to the quantity, out of 360°
- Each slice is 90°
- It is chosen randomly
- It equals the number of students
Show answer
Answer: A. It is proportional to the quantity, out of 360°
Why: Divide 360 in the ratio of the quantities. [p.61]
Why: Divide 360 in the ratio of the quantities. [p.61]
Q6. Of 360 people, 90 liked summer. What angle (degrees) represents summer in a pie chart?
Show answer
Answer: 90 (± 0)
Why: 90/360 × 360 = 90°. [p.62]
Why: 90/360 × 360 = 90°. [p.62]
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Frequently asked questions
How many practice questions are there for Class 8 Mathematics Chapter 3: Proportional Reasoning-2?
42 questions (17 easy, 19 medium, 6 hard). A few are solved on this page; the free test shows the answer and explanation for every question after you submit.
Is this chapter from the NCERT book?
Yes — it follows the NCERT Class 8 Mathematics syllabus, used by CBSE and many state boards.