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Ratio and Proportion - Quant/Math - CAT 2009
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Question 4 the day:
May 2, 2003
The question for the day is from the topic of Ratio and Proportion.
If x and y are connected by the relation x
2
+ 4y
2
= 4xy, then ratio of x to y is
(1)
2 : 1
(2)
1 : 2
(3)
1 : 1
(4)
4 : 1
Correct Answer -
(1)
Solution:
x
2
+ 4y
2
= 4xy can be written as x
2
- 4xy + 4y
2
= 0
=> (x - 2y)
2
= 0
Therefore x = 2y, x/y = 2, hence the ratio of x to y is 2:1.
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