Physics, 03.08.2020 14:01 perezsamantha3oqr0za

On a 100km track , a train travels the first 30km with a speed of 30km/h. how fast the train travel the next 70 km if the average speed for the entire journey is 40km/h NO SPAMMING PLZ

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On a 100km track , a train travels the first 30km with a speed of 30km/h. how fast the train travel...