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Mathematics, 27.05.2021 23:00 vpoon6739
Sarah walks uphill at an average of 2 miles per hour, and downhill at an average of 4 miles per hour. She goes for a 6 mile hike up a hill, and then returns downhill by the same route. What is Sarah's average speed for the whole journey?
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Sarah walks uphill at an average of 2 miles per hour, and downhill at an average of 4 miles per hour...
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