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The product of the duplicate ratio of...

The product of the duplicate ratio of `2a :6b\ a n d\ ` the reciprocal ratio f `4a^2: 25 b^2` is `0` b. `1` c. `a : b` d. none of these

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RS AGGARWAL-RATIO AND PROPORTION-All Questions
  1. The mean proportional between (3+sqrt(2))a n d\ (12-sqrt(32)) is sq...

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  2. The ratio between the third proportional of 12 and 30 and mean prop...

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  3. The product of the duplicate ratio of 2a :6b\ a n d\ the recipr...

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  4. Find the two numbers whose mean proportion is 12 and the third prop...

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  5. The present ages of A, B, and C are in the ratio of 8:14:22 respect...

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  6. When 30% of one number subtracted from another number, the second n...

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  7. Rita invested 25% more than Sunil. Sunil invested 30% less than Abhina...

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  8. One-fourth of sixty percent a number is equal to two fifths of twen...

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  9. The total number of boys in a school is 16% more that the total num...

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  10. The number of students in two sections A and B having different hei...

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  11. Determine the ratio of the number of people having characteristic X...

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  15. The bus fare and train fare of a place from Kolkata were Rs. 20 and...

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  16. The monthly incomes of tow families A and B are shown by the follow...

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  17. In a class the number of girls is 20% more than that of the boys. T...

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  18. If the income of A is 105 more than that of Band the income of B is...

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  19. Two numbers are respectively 20 percent and 50 percent more than a ...

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  20. What is the ratio whose terms differ by 40 and the measure of which...

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