Quizzes & Puzzles46 mins ago
Flying Planes
2 Answers
An aeroplane is flying horizontally in a straight line at 360mph will pass directly over the head of an observer. Twenty seconds ago the angle of the plane above the horizontal measured by the observer was 30degrees. Ten seconds ago it was 60 degrees.
When was it directly overhead?
How high is it above the ground?
When was it directly overhead?
How high is it above the ground?
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