Mathematics · 2020
JEE Main · 6 September 2020, Shift 2 · Q69
The angle of elevation of the summit of a mountain from a point on the ground is 45°. After climbing up one km towards the summit at an inclination…
The angle of elevation of the summit of a mountain from a point on the ground is $\displaystyle 45$°. After climbing up one km towards the summit at an inclination of $\displaystyle 30$° from the ground, the angle of elevation of the summit is found to be $\displaystyle 60$°. Then the height (in km ) of the summit from the ground is :
Official answer
(2)
$\displaystyle \frac{1}{\sqrt{3}-1}$
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JEE Main 2020 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.