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The angles of depression of two ships...

The angles of depression of two ships from the top of a light house are `45o` and `30o` towards east. If the ships are 100 m apart, the height of the light house is `(50)/(sqrt(3)+1)m` (b) `(50)/(sqrt(3)-1)m` (c) `50(sqrt(3)-1)m` (d) `50(sqrt(3)+1)m`

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