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Class 8 Maths Chapter 13 Direct And Inverse Proportions Quiz 6 (25 MCQs)

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1. T is inversely proportional to vt=2 when v=6Find the equation for t and v
2. Which of the following represents direct variation?
3. The gallons of water used to take a shower varies directly with the number of minutes in the shower. If an 8 minute shower uses 48 gallons of water, find the constant of variation.
4. In which of the following case, x and y are said to be in inverse proportion?
5. Pages read daily and days needed to finish a reading relates to
6. 48 men were deployed to construct a bridge in 30 days.How many days does it take for 8 men to construct the same bridge?
7. An electric pole, 12 metres high, casts a shadow of 18 metres at a certain time. What is the height of a tree that casts a shadow of 16 metres under similar conditions?
8. Identify a real-life scenario that represents a direct proportion.
9. Suppose y varies inversely with x.If y = 150 when x = 2, find y when x = 25.
10. Direct proportion, inverse proportion or neither?It takes 6 minutes to hard boil three eggs in a pan. How long would it take to boil two eggs?
11. Jackie cooked 9 burgers in 45 minutes. How many burgers could she cook in an hour and a half?
12. Kendra earns $ 32.50 for working 7 hours. If the amount m she earns varies with h the number of hours she works, how much will she earn for working 12 hours?
13. Y is directly proportional to x. y=2 when x=4, which of the following is the correct equation connecting y and x.
14. 6 pipes are required to fill a tank in 1 hour 20 minutes. How long will ittake if only 4 pipes of the same type are used?
15. The cost of 5 metres of a particular quality of cloth is ā‚¹ 210. Tabulate the cost of 13 metres of cloth of the same type.
16. Which of the following represents indirect variation?
17. If 12 workers can construct a road of length 5 km in 25 hours, how many more workers will be required to do the same work in 15 hours?
18. A school has 8 periods a day each of 45 minutes duration. How long would each period be, if the school has 9 periods a day, assuming the number of school hours to be the same?
19. . A group of 3 friends staying together, consume 54 kg of wheat every month. Some more friends join this group and they find that the same amount of wheat lasts for 18 days. How many new members are there in this group now?
20. A boy runs 1 km in 10 minutes. How long will he take to ran 600 m?
21. Both x and y vary inversely with each other. When x is 10, y is 6, which of the following is not a possible pair of corresponding values of x and y?
22. Ten identical pipes turned on simultaneously can fill a swimming pool in 9 hours. How long will it take 6 pipes to fill the same swimming pool?
23. A worker is paid Rs 210 for 6 days work. If his total income of the month is Rs 875, for how many days did he work?
24. On a scale drawing, 2 feet represents 30 yards. How many yards are represented by 3 feet?
25. 6 pipes are required to fill a tank in 1 hour 20 minutes. How long will it take if only 5 pipes of the same type are used?
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