Mathematical and Physical Journal
for High Schools
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Problem P. 4508. (February 2013)

P. 4508. The average speed of the tourists when they walk from the shelter house to the hilltop was 1.5 km/h, whilst on the way back it was 3.5  km/h. The average speed for the whole distance from the shelter house back to the shelter house was 2 km/h. What fraction of the total time of the excursion did the tourist spend on the hilltop having a rest?

(3 pont)

Deadline expired on March 11, 2013.


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

Megoldásvázlat. A teljes idő \(\displaystyle \frac{1}{21}\) részét, vagyis majdnem 5 százalékát.


Statistics:

164 students sent a solution.
3 points:140 students.
2 points:2 students.
1 point:9 students.
0 point:11 students.
Unfair, not evaluated:2 solutions.

Problems in Physics of KöMaL, February 2013