Published by:
CGP EDU Academic Team
Published on: August 14, 2026
The angle of elevation of a cloud from a point 10 meters above the surface of a lake is 30° and the angle of depression of its reflection from that pointis 60°. Then the height of the cloud above the lake is
A
20 meters
B
20 
meters
meters
C
meters
D
meters
Text Solution
Verified by ExpertsThe correct answer is:
A
20 meters
Let C be the cloud, D its reflection and PB is the surface of the lake
Then,
PC = PD = H,
QA=(H- 10) cot 30° = (H+ 10) cot 60°
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