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The variable x varies directly as y and ...

The variable x varies directly as y and x = 80 when y is 160. What is y when x is 64?

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NCERT EXEMPLAR-DIRECT AND INVERSE PROPORTIONS -EXERCISES
  1. In the following questions, which of them vary directly and which vary...

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  2. If x varies inversely as y and x = 20 when y = 600, find y when x = 40...

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  3. The variable x varies directly as y and x = 80 when y is 160. What is ...

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  4. l varies directly as m and l is equal to 5, when m=2/3 Find l when m...

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  5. If x varies inversely as y and y = 60 when x = 1.5. Find x. when y = 4...

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  6. In a camp, there is enough flour for 300 persons for 42 days. How long...

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  7. A contractor undertook a contract to complete a part of a stadium in 9...

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  8. Sobi types 108 words in 6 minutes. How many words would she type in ha...

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  9. A car covers a distance in 40 minutes with an average speed of 60 km/h...

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  10. It is given that l varies directly as m. Write an equation which rel...

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  11. It is given that l varies directly as m. Find the constant of propor...

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  12. It is given that l varies directly as m. Find l, when m is 33.

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  13. It is given that l varies directly as m. Find m when l is 8.

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  14. If a deposit of Rs 2,000 earns an interest of Rs 500 in 3 years, how m...

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  15. The mass of an aluminium rod varies directly with its length. If a 16 ...

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  16. if 3, x, 6, 18 are in proportion , then x =

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  17. Find the value of x , if y = 2 x − 5 and y = 7 .

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  18. If Naresh walks 250 steps to cover a distance of 200 metres, find the ...

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  19. A car travels a distance of 225 km in 25 litres of petrol. How many li...

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  20. From the following table, determine if x and y are in direct proportio...

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