$y$ is inversely proportional to $x$ . When $y = 3, x = 2$ . Find value of $x$ when $y = 8$ $

3.5

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4.5

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2.5

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7

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Solution

The correct option is D $4.5$
$y \propto \frac{1}{x}$
$x y = c o n s t a n t$
$\Rightarrow 3 \times 12 = x \times 8$
$\Rightarrow x = \frac{3 \times 12}{8} = 4.5$

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Question 66

If x varies inversely as y and y = 60 when x = 1.5. Find x, when y = 4.5

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y is inversely proportional to x. When y=3,x=2. Find value of x when y=8$

The correct option is D 4.5y∝1xxy=constant⇒3×12=x×8⇒x=3×128=4.5

$y$ is inversely proportional to $x$ . When $y = 3, x = 2$ . Find value of $x$ when $y = 8$ $

The correct option is D $4.5$
$y \propto \frac{1}{x}$
$x y = c o n s t a n t$
$\Rightarrow 3 \times 12 = x \times 8$
$\Rightarrow x = \frac{3 \times 12}{8} = 4.5$