Mathematical and Physical Journal
for High Schools
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Problem P. 4370. (October 2011)

P. 4370. A plane covers a distance of 2 km in 15 s when it flies downwind and in 20 s when it flies into the wind. Calculate the speed of the plane in km/h, and the speed of the wind.

(3 pont)

Deadline expired on November 10, 2011.

Sorry, the solution is available only in Hungarian. Google translation

Megoldás. A repülőgép sebessége 420 km/h; a szélsebesség 60 km/h.


391 students sent a solution.
3 points:329 students.
2 points:34 students.
1 point:11 students.
0 point:3 students.
Unfair, not evaluated:14 solutionss.

Problems in Physics of KöMaL, October 2011