Mathematics · 2019
JEE Main · 12 April 2019, Shift 2 · Q89
The angle of elevation of the top of a vertical tower standing on a horizontal plane is observed to be 45° from a point A on the plane. Let B be the…
The angle of elevation of the top of a vertical tower standing on a horizontal plane is observed to be $\displaystyle 45$° from a point A on the plane. Let $\displaystyle B$ be the point $\displaystyle 30$ m vertically above the point A. If the angle of elevation of the top of the tower from B be $\displaystyle 30$°, then the distance (in m) of the foot of the tower from the point A is :
Official answer
(2)
$\displaystyle 15(3+\sqrt{3})$
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JEE Main 2019 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.