KöMaL - Mathematical and Physical Journal for Secondary Schools
Hungarian version Information Contest Journal Articles News
Conditions
Entry form to the contest
Problems and solutions
Results of the competition
Problems of the previous years

 

 

Order KöMaL!

tehetseg.hu

Ericsson

Google

Emberi Erőforrások Minisztériuma

Emberi Erőforrás Támogatáskezelő

Oktatáskutató és Fejlesztő Intézet

ELTE

Competitions Portal

P. 4214. A freight train, undergoing uniform motion, passes the semaphore next to the rails in 4 seconds. Then it passes a 40-m long train, which moves with the same speed as the freight train but into the opposite direction, also in 4 seconds. What is the speed of the freight train in km/h?

(3 points)

Deadline expired.


Google Translation (Sorry, the solution is published in Hungarian only.)

Megoldás. A vonat hossza 40 m, sebessége 36 km/h.


Statistics on problem P. 4214.
175 students sent a solution.
3 points:134 students.
2 points:14 students.
1 point:14 students.
0 point:10 students.
Unfair, not evaluated:3 solutions.


  • Problems in Physics of KöMaL, January 2010

  • Our web pages are supported by: Ericsson   Google   SzerencsejátĂ©k Zrt.   Emberi ErĹ‘források MinisztĂ©riuma   Emberi ErĹ‘forrás TámogatáskezelĹ‘   OktatáskutatĂł Ă©s FejlesztĹ‘ IntĂ©zet   ELTE   Nemzeti TehetsĂ©g Program