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Mathematics, 18.07.2019 05:30 deedee2094

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

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If ying zyiyu covers the first 200 miles of a trip going at 50 mph and the last hundred going 40 mph...
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