Mathematical and Physical Journal
for High Schools
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Problem P. 4327. (March 2011)

P. 4327. One of the trains of the M2 metro line in Budapest consists of 5 cars. When the train starts, each car uses 300 A current from the 800 V voltage supply. How much does it cost to accelerate this train for 10 seconds, if the price of 1 kWh is 18 euro cents?

(3 pont)

Deadline expired on April 11, 2011.

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

Megoldás. Kb. 160 Ft.


152 students sent a solution.
3 points:136 students.
2 points:9 students.
1 point:3 students.
0 point:1 student.
Unfair, not evaluated:3 solutionss.

Problems in Physics of KöMaL, March 2011