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NDA 2017 Mathematics question

MathematicsSolution of TrianglesNDA 2017

Not in JEE syllabus

The angle of elevation of a stationary cloud from a point 25 m above a lake is and the angle of depression of its image in the lake is . The height of the cloud above the lake level is

Answer: (B)

Solution

Let the cloud be m above the lake and the horizontal distance. and $45° =

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Question ID VK-028722