The subduplicate ratio of $9 : 1$ is $(x + y) : (x - y)$ . Then $x : y =$ _____

2 : 1

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1 : 2

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4 : 3

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6 : 4

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Solution

The correct option is A $2 : 1$
The subduplicate ratio of $9 : 1$ is $\sqrt{9} : \sqrt{1} = 3 : 1$
$∴ \frac{x + y}{x - y} = \frac{3}{1} \Rightarrow x + y = 3 x - 3 y$
$\Rightarrow 2 x = 4 y \Rightarrow \frac{x}{y} = \frac{4}{2} = \frac{2}{1}$

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Similar questions

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(6) $(9 x - 5 t) (9 x + 3 t)$
(7) $(m + \frac{2}{3}) (m - \frac{7}{3})$
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(9) $(\frac{1}{y} + 4) (\frac{1}{y} - 9)$

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The subduplicate ratio of 9:1 is (x+y):(x−y). Then x:y= _____

The correct option is A 2:1The subduplicate ratio of 9:1 is √9:√1=3:1∴x+yx−y=31⇒x+y=3x−3y⇒2x=4y⇒xy=42=21

The subduplicate ratio of $9 : 1$ is $(x + y) : (x - y)$ . Then $x : y =$ _____

The correct option is A $2 : 1$
The subduplicate ratio of $9 : 1$ is $\sqrt{9} : \sqrt{1} = 3 : 1$
$∴ \frac{x + y}{x - y} = \frac{3}{1} \Rightarrow x + y = 3 x - 3 y$
$\Rightarrow 2 x = 4 y \Rightarrow \frac{x}{y} = \frac{4}{2} = \frac{2}{1}$