Mathematics, 01.08.2019 11:20, chubnastii

Atrain travelled a certain journey and is supposed to arrive at midday. when its average speed is 40km/h, it arrives at 1pm. when its average speed is 48km/h, it arrives at 11am. what is the length of the journey?

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Atrain travelled a certain journey and is supposed to arrive at midday. when its average speed is 40...