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Grade 8

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NCERT Solutions - Mathematics , Class 8 chapter-arrow

Direct and Inverse Proportions exercise-arrow

Exercise 13.1

Questions in Exercise 13.1

BOOKS

1. NCERT Solutions - Mathematics , Class 8

CHAPTERS

1. Rational Numbers

2. Linear Equations in One Variable

3. Understanding Quadrilaterals

4. Data Handling

5. Squares and Square Roots

6. Cubes and Cube Roots

7. Comparing Quantities

8. Algebraic Expressions and Identities

9. Visualising Solid Shapes

10. Mensuration

11. Exponents and Powers

12. Direct and Inverse Proportions

13. Factorisation

14. Introduction to Graphs

15. Playing with Numbers

EXERCISES

1. Exercise 13.1

2. Exercise 13.2

Q1) Followings are the car parking charges near a railway station Opto

Check if the parking charges are in a direct proportion to parking time.

Q2) A mixture of paint is prepared by mixing 1 pan of red pigments with 8 parts of the base. In the following table, find the parts of the base that need to be added.

Q3) In question 2 above if 1 part of a red pigment requires 75 ml. of the base, how much red pigment should we mix with 1800 ml. of base.

Q4) A machine in a soft drink factory fills 840 bottles in six hours. How many bottles will it fill in five hours?

Q5) A photograph of a bacteria enlarged 50,000 times attains a length of 5 cm as shown in the diagram. What is the actual length of the bacteria? If the photograph is enlarged 20,000 times only, want would be its enlarged length?

Q6) In a model of a ship, the mast is 9 cm high, while the mast of the actual ship is 12 m high. If the length of the ship is 28 m, how long is the model ship?

Q7) Suppose 2 kg of sugar contains $9\times10^6$ crystals. How many y sugar crystals are there in

(i) 5 kg of sugar?

(ii) 1.2 kg of sugar?

Q8) Rashmi has a road map with a scale of 1cm representing 18kg. She drives on a road for 72. What would be her distance covered on the map?

Q9) A 5m 60cm high vertical pole casts a shadow 3m 20= long. Find at the same time (i) the length of the shadow cast another pole 10m 50cm high (ii) the height of a pole which casts a shadow 5m long.

Q10) A loaded truck travels 14km in 25 minutes. If the speed remains the same, how far can it travel in 5 hours?

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Questions in Exercise 13.1

Q1) Followings are the car parking charges near a railway station Opto

Check if the parking charges are in a direct proportion to parking time.

Q2) A mixture of paint is prepared by mixing 1 pan of red pigments with 8 parts of the base. In the following table, find the parts of the base that need to be added.

Q3) In question 2 above if 1 part of a red pigment requires 75 ml. of the base, how much red pigment should we mix with 1800 ml. of base.

Q4) A machine in a soft drink factory fills 840 bottles in six hours. How many bottles will it fill in five hours?

Q5) A photograph of a bacteria enlarged 50,000 times attains a length of 5 cm as shown in the diagram. What is the actual length of the bacteria? If the photograph is enlarged 20,000 times only, want would be its enlarged length?

Q6) In a model of a ship, the mast is 9 cm high, while the mast of the actual ship is 12 m high. If the length of the ship is 28 m, how long is the model ship?

Q7) Suppose 2 kg of sugar contains $9\times10^6$ crystals. How many y sugar crystals are there in

(i) 5 kg of sugar?

(ii) 1.2 kg of sugar?

Q8) Rashmi has a road map with a scale of 1cm representing 18kg. She drives on a road for 72. What would be her distance covered on the map?

Q9) A 5m 60cm high vertical pole casts a shadow 3m 20= long. Find at the same time (i) the length of the shadow cast another pole 10m 50cm high (ii) the height of a pole which casts a shadow 5m long.

Q10) A loaded truck travels 14km in 25 minutes. If the speed remains the same, how far can it travel in 5 hours?

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Learn from an expert tutor.

Book a free class now

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