C. 981. The captain of a ship wrote down the formula in his log book for the distance to the horizon. Unfortunately, the number p got blurred. d denotes the distance to the horizon in kilometers, and h stands for the height of the eyes of the observer above sea level in metres. Determine a value of p that provides a practicable formula. (Use 6370 km for the radius of the Earth.)
Google Translation (Sorry, the solution is published in Hungarian only.)
Megoldás. Készítsünk ábrát.
Pitagorasz-tétellel: , amiből . Ha h kicsi és R=6370 km, akkor km.
Statistics on problem C. 981. 171 students sent a solution.
5 points:79 students.
4 points:18 students.
3 points:55 students.
2 points:11 students.
1 point:1 student.
0 point:2 students.
Unfair, not evaluated:5 solutions.