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Ravi Hirani · Answer 1 · 2019-06-26T08:16:43+0000

That's a right triangle with hypotenuse 3000 and the height y is the side opposite the elevation angle of 15 degrees.

$y = 3000 \sin 15^\circ$

We can actually compute
$\sin 15^\circ$ exactly but I won't bother.

$y \approx 776 \textrm{ feet}$

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