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If x^2 + 4y^2 = 4xy, then x : y =...

If `x^2 + 4y^2 = 4xy`, then x : y =

A

2 : 1

B

1 : 2

C

- 2 : 1

D

-1 : 3.

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UNITED BOOK HOUSE-Ratio and proportion-Exercise
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  2. If x^2 + 4y^2 = 4xy, then x : y =

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  3. If the mean peoportional of 1/12. and a/75 is 1/5, then the value of a...

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  4. If A : B = 2 : 3, B : C = 4 : 5 and C : D = 6 : 7,then A : D =

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  5. If (p^2 + q^2) (m^2 + n^2) = (pm + qn)^2, then m : n =

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  6. If bcx = cay = abz, then x : y : z =

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  7. If a + 1/b = b + 1/c = 1, then the value of c + 1/a is

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  8. If a/3 = b/4 = c/7 = 2a - 2b + c/p, then the value of p is

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  9. x is a positive number and 3/4 : x :: x : 27/64, then the value of x i...

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  10. If x, y, z are in continued proportion, then (1)/(y^2 -x^2) + (1)/(y^2...

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  11. The mean proportional between (3 + sqrt2) and (12 - sqrt32) is

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  12. The ratio 2^1.5 : 2^0.5 is the same as

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  13. If a : b = 2/9 : 1/3, b : c = 2/7 : 5/14 and d : c = 7/10 : 3/5 then a...

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  14. To get the ratio p : q (for p not equals to q) one has to add a number...

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  15. If a : (b + c) = 1 : 3 and c : (a + b) = 5 : 7, them b : (a + c) is eq...

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  16. The ratio of 25^2.5 : 5^3 is same as

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  17. If 2a = 3b = 8c, then a : b : c equals

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  18. Tom is chasing jerry. In the same interval of time Tom jumps 8 times w...

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  19. If a : b = b : c, then a^4 : b^4 is equal to

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  20. x, 12, y and 27 are in continued proportion. Then x + y equals

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