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Class 8 Maths Chapter 13 Direct And Inverse Proportions Quiz 2 (25 MCQs)

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1. 48 men were deployed to construct a bridge in 30 days.How many days does it take for 16 men to construct 2 identical bridges?
2. The number of teeth and the age of a person vary
3. The number of hours required to do a job varies inversely as the number of people working. It takes 8 hours for 4 people to paint the inside of a house. How long would it take 5 people to do the job?
4. The time to complete a project varies inversely with the number of employees. If 3 people can complete the project in 7 days, how long will it take 5 people?
5. Both x and y vary directly with each other and when x is 10, y is 14, which of the following is not a possible pair of corresponding values of x and y?
6. A farmer has enough food to feed 20 animals at his farm for 6 days. How long the food lost if there were 10 more animals in the farm?
7. The population of a country and the area of land per person are inversely proportional
8. Which equation shows a direct proportion?
9. Suppose y varies directly as x. If y = 22.5 when x = 15, find y when x = 20.
10. A truck needs 54 litres of diesel for covering a distance of 297 km. The diesel required by the truck to cover a distance of 550 km is
11. The equation xy = 25 represents:
12. It takes 4 people 2 days to paint a wall. How long would it take if we got8 people to do it?
13. The more people the more plates of rice needed. This sentence refers to
14. The variable x varies directly as y and x-80 when y is 160. What is y when x is 64?
15. A truck runs at the speed of 36km/hr. How far does it go in 12 seconds?
16. What is the relationship between two quantities in a direct proportion?
17. A horse eats 18 kg of com in 12 days? How much does he eat in 9 days?
18. If the price of 15 books is Rs. 270, then how many such books can be bought in Rs. 450?
19. Both a and b vary inversely proportional to each other. When a is 0.05, b is 1.25. What will be the value of b when a is 2.4?
20. Trina's paycheck earnings varies directly as the number of hours she works. If she works 19 hours and earns $ 187.15, what should she earn if she worked 40 hours?
21. Y varies directly with x, and y is 84 when x is 16. Which equation represents this situation?
22. Say 'TRUE' or 'FALSE'The population of a country and the area of land per person are inversely proportional
23. The rent of 7 hectares is Rs 875. What is the rent of 16 hectares?
24. Give an example of a direct proportion from everyday life.
25. 15 books weigh 6 kg. What will 6 books weigh?
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