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Question

From the top of a light house 60 meter high, with its base at the sea level, the angle of depression of a boat is 30. The distance of the boat from the foot of the light-house is

A
603 meters
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B
603 meters
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C
60 meters
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D
302 meters
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Solution

The correct option is D 603 meters
Height of light house =60 m
Angle of depression = 30
Let the distance of boat from the light house = s
Then, angle of depression = angle of elevation
tan of elevation = heightdistance
tan30=60s
s=603 m

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