Ivan Shishkin, Rye (1878)

Problems/Enigma

Adventures on the German Autobahn

by Anduril·
25
Difficulty scaleÉchelle de difficulté

This score reflects both the level of the required concepts and the difficulty of the solution.Ce score tient compte à la fois du niveau des notions nécessaires et de la difficulté de la résolution.

  1. 1–10First steps / middle schoolPremiers pas / collège
  2. 11–25Beginner / high schoolDébutant / lycée
  3. 26–50Intermediate / undergraduateIntermédiaire / licence
  4. 51–70Advanced / graduateAvancé / master
  5. 71–90Expert / specializedExpert / spécialisé
  6. 91–100Research levelNiveau recherche
These levels are approximate guides.Ces niveaux sont des repères approximatifs.
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ReviewedReviewed by Ancient Tree
·
English
EnglishAdd translation

This problem was submitted to “Little adventures”.

Enjoying the unrestricted speed on the German Autobahn (highway), a driver travels 100 miles in one hour.

Show that there is a 15 minute interval when he did exactly 25 miles.

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Solutions

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Solution by Anatoill

Discussions30 useful votes

Well, 1 hour = 60 minuts
V = 100m/h
S = 25m
t = S : V = 25 : 100 = 0,25h
t = 60 * 0,25 = 15m
That shows that if driver was driving 15 minutes with a speed 100m/h driver will drive distanse
of exactly 25m (I’m sorry if i lost something and if there are some mistakes)

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