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If the cost of 15 books is Rs. 90, then ...

If the cost of 15 books is Rs. 90, then what is the cost of one book?

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Rs. 6
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PEARSON IIT JEE FOUNDATION-RATIO, PROPORTION AND VARIATION-TEST YOUR CONCEPTS
  1. If 7:15=56:x, then what is the value of x?

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  2. Find the fourth proportional to 72, 168, and 150.

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  3. If the cost of 15 books is Rs. 90, then what is the cost of one book?

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  4. When x = 2, 7, 11, …, y = 8, 28, 44, …, then x and y are in .

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  5. When x and y are in indirect proportion and if y doubles, then x becom...

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  6. Eight men can do a certain amount o work in 3 days. Sixteen men can do...

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  7. The ratio obrtained when 9:11 is written with its consequent equal to ...

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  8. A and B share some marbles in the ratio 4 : 5. If B gets 10 marbles mo...

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  9. A and B share some marbles in the ratio 4 : 5. If B gets 10 marbles mo...

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  10. If A : B = 3 : 4 and B : C = 12 : 13, then find A : C.

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  11. If x, 20, 30, and 60 are in proportion, then what is the value of x?

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  12. The sub-duplicate ratio of 64 : 81 is .

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  13. If x : y = 5 : 7, then find (3x+4y):(x+2y).

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  14. If 40 men complete a piece of work in 5 days, then 80 men can complet...

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  15. The area of a circle (A) varies directly as the square of its radius. ...

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  16. 120 men can lay a road 80 km long in 20 days. In how many days can 100...

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  17. A certain sum of money is divided between X and Y in the ratio of 2(1)...

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  18. Find the number which bears the same ratio to (5)/(9) as (3)/(2) does ...

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  19. Arrange the ratios 3:4,5:6,1:2 and 19:15 ini their increasing order of...

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  20. What number must be added to each term of the ratio 7 : 5 so that it b...

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