SOLUTION: 17 From the top of a vertical cliff 68 m high, an observer
notices a yacht at sea. The angle of depression to the
yacht is 47è. The yacht sails directly away from the cliff,
and
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-> SOLUTION: 17 From the top of a vertical cliff 68 m high, an observer
notices a yacht at sea. The angle of depression to the
yacht is 47è. The yacht sails directly away from the cliff,
and
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Question 714990: 17 From the top of a vertical cliff 68 m high, an observer
notices a yacht at sea. The angle of depression to the
yacht is 47è. The yacht sails directly away from the cliff,
and after 10 minutes the angle of depression is 15è. How
fast does the yacht sail? Answer by KMST(5328) (Show Source):
You can put this solution on YOUR website!
T = top of the cliff (we assume eye of observer is there, 68 meters above water surface)
B = bottom of the cliff (at water level)
X = initial position of the yacht
Y = position of the yacht 10 minutes later
TH = a horizontal line, parallel to BY.
angle HTX = --> Angle BTX =
angle HTY = --> Angle BTY =
The yacht covered in 10 minutes.
We could say that its speed in meters per minute is
