The angle of elevation of a stationar cl...

The angle of elevation of a stationar cloud from a point 2500 m above a lake is `15^(@)` and from the same point the angle of depression of its reflectin in the lake is `45^(@)`. The height (in meters) of the cloud above the lake, given that `cot15^(@)=2+sqrt3`, is

2500

`2500sqrt`

`2500sqrt3`

5000

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