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Earth has a radius of 6371 kilometers. A pilot is flying at a steady altitude of 6.6 kilometers above the earth's surface.


What is the pilot's distance to the horizon?


Enter your answer, rounded to the nearest tenth, in the box.

 Mar 8, 2019

We have a right triangle with   a hypotenuse of   6371 + 6.6  =  6377.6 km


The Earth's radius is one of the legs = 6371 km


And the distance to the horizon is the other leg and is given by :


√ [ 6377.6^2 -6371^2 ]  ≈   290.1 km


cool cool cool

 Mar 8, 2019

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