KöMaL 2005 C812
A steam locomotive is going to Kanizsa from Zalakomár that is 21 km away. The journey takes 16 minutes. The locomotive accelerates uniformly to 90 km/h, then continues at constant speed, and then decelerates uniformly to rest. How long is it travelling at constant speed?
Official text KöMaL. Quoted with source.
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