Mathematical and Physical Journal
for High Schools
Issued by the MATFUND Foundation
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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