ExamVeda
Login
Home

If x2 + 4y2 = 4xy then x y is

This question belongs to Arithmetic Ability Ratio
Ratio
?

If x2 + 4y2 = 4xy, then x : y is -

Answer & Solution
Correct Answer: Option C
$$\eqalign{ & = {x^2} + 4{y^2} = 4xy \cr & \Rightarrow {x^2} - 4xy + 4{y^2} = 0 \cr & \Rightarrow \left( {x - 2{y^2}} \right) = 0 \cr & \Rightarrow x = 2y \cr & \Rightarrow \frac{x}{y} = 2 \cr & \Rightarrow x:y = 2:1 \cr} $$
Examveda
Question posted by Examveda
Community

Join the Discussion

No comments yet Be the first to discuss this question.
Keep Learning

Related Questions on Ratio

If a : b : c = 3 : 4 : 7, then the ratio (a + b + c) : c is equal to
A. 2 : 1 B. 14 : 3 C. 7 : 2 D. 1 : 2
The number of students in 3 classes is in the ratio 2 : 3 : 4. If 12 students are increased in each class this ratio changes to 8 : 11 : 14. The total number of students in the three classes in the beginning was
A. 162 B. 108 C. 96 D. 54
A box has 210 coins of denominations one-rupee and fifty paise only. The ratio of their respective values is 13 : 11. The number of one-rupee coin is
A. 65 B. 66 C. 77 D. 78
If $$\frac{2}{3}$$ of A=75% of B = 0.6 of C, then A : B : C is
A. 2 : 3 : 3 B. 3 : 4 : 5 C. 4 : 5 : 6 D. 9 : 8 : 10
More Related Questions on Ratio