Answer:
The pilot's distance to the horizon is 267.183 kilometers.
Step-by-step explanation:
It is given that earth has a radius of 6371 kilometers. A pilot is flying at a steady altitude of 5.6 kilometers above the earth's surface.
Using Pythagoras theorem in triangle OAB, we get




Taking square root on both the sides,



Therefore the pilot's distance to the horizon is 267.183 kilometers.