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On a 200km track, a train travels the first 50km at a uniform speed of 40km/h . How fast the train must travel the next 150km so as to maintain the average speed of 60km/h for the whole journey? |
| Answer» On a 200km track, a train travels the first 50km at a uniform speed of 40km/h . How fast the train must travel the next 150km so as to maintain the average speed of 60km/h for the whole journey? | |