On walking $x$ meters, making an angle of $30^{o}$ with the ground, to find a ball fallen in a valley, one can reach a depth of ' $y$ ' meters below the ground, then

x = y

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x = 2 y

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2 x = \sqrt{3} y

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2 x = y

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Solution

The correct option is B $x = 2 y$
According to the given fig.
$sin 30^{o} = \frac{1}{2}$
$\frac{y}{x} = \frac{1}{2}$
$∴ x = 2 y$

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