Mathematics, 03.07.2019 18:30, blewcblankz56

If ying zyiyu covered the first 200 miles of a trip going at 50 mph and the last hundred miles going at 40 mph, what was his average speed for the entire trip?

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If ying zyiyu covered the first 200 miles of a trip going at 50 mph and the last hundred miles going...

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