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MCQs on Direct and Inverse Proportions
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MCQs on Direct and Inverse Proportions
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25 Questions

1. If 20 cows eat as much as 15 oxen, how many cows will eat at much as 36 oxen ?
2. 6 pipes are required to fill a tank in 1 hour. How long will it take if only 5 pipes of the same type are used ?
3. The rent of 7 hectares is Rs 875. What is the rent of 16 hectares ?
4. 6 pipes are required to fill a tank in 1 hour 20 minutes. If we use 5 such types of pipes, how much time it will take to fill the tank?
5. The scale of a map is given as 1 : 300. Two cities are 4 km apart on the map. The actual distance between them is:
6. If 3 quintals of coal cost Rs 6000, what is the cost of 120 kg ?
7. A boy runs 1 km in 10 minutes. How long will he take to ran 600 m ?
8. If x ∝ y and x1= 5, y1 = 210 and x2 = 2, then find y2 ?
9. 40 cows can graze a field in 16 days. How many cows will graze the same field in 10 days ?
10. If x and y are directly proportional, then which of the following is correct?
11. If the weight of 12 sheets of thick paper is 40 grams, how many sheets of the same paper would weigh 2500 grams?
12. If x = ky and when y = 4, x = 8 then k =
13. 3 knives cost Rs 63. What will 17 knives cost ?
14. 8 g of sandal wood cost Rs 40. What will 10 g cost ?
15. If x = 15 and y = 1/30, then x and y are:
16. Apala types 200 words in half an hour. How many words will she type in 12 minutes ?
17. If 12 workers can build a wall in 50 hours, how many workers will be required to do the same work in 40 hours?
18. A horse eats 18 kg of com in 12 days ? How much does he eat in 9 days ?
19. 15 men can mow 40 hectares of land in 1 day. How much will 6 men mow in 1 day ?
20. A machine in a soft drink factory fills 600 bottles in 5 hours. How many bottles will it fill in 2 hours ?
21. A man walks 20 km in 5 hours. How long would he take in walking 32 km ?
22. x and y vary inversely with each other. If x – 15 when y = 6, then the value of x when y = 15 is
23. A labourer is paid Rs 400 for 2 days work. If he works for 5 days, how much will he get ?
24. If x and y are inversely proportional, then which one is true?
25. 120 copies of a book cost Rs 600. What will 400 copies cost ?

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