Mathematics, 21.09.2019 08:10, thefish81
Ahelicopter flies horizontally at 100 km per hour. it takes 20 seconds for the helicopter to fly from directly overhead to being at an angle of elevation of 60 degrees. find the height of the helicopter above the ground.
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Ahelicopter flies horizontally at 100 km per hour. it takes 20 seconds for the helicopter to fly fro...
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