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JEE MAIN 2020
06-09-2020 S2
Question
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 of 30° from the ground, the angle of elevation of the summit is found to be 60°. Then the height (in km) of the summit from the ground is :
Select the correct option:
A
$\frac{1}{\sqrt{3}+1}$
B
$\frac{1}{\sqrt{3}-1}$
C
$\frac{\sqrt{3}+1}{\sqrt{3}-1}$
D
$\frac{\sqrt{3}-1}{\sqrt{3}+1}$
✓ Correct! Well done.
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