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.
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
+8 
