Mathematics, 10.05.2020 10:57 lakenyagillard79

Ying Zyiyu covered the first 300 miles of a trip going at 60 mph and the last hundred going at 40 mph. What was his average speed for the entire trip?
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Ying Zyiyu covered the first 300 miles of a trip going at 60 mph and the last hundred going at 40 mp...

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