If x ∝ y , and y = 9 when x = 3. If value of y = 27 then value of x =

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Solution

The correct option is B
9

If x ∝ y then x varies directly as y.

When y = 9 , x = 3

Putting this in x = ky we get 3 = 9k

$\Rightarrow$ k =1/3

putting k = 1/3 and y = 27 in x = ky we get x = 27/3 = 9.

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