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21 August, 21:45

Starting at home I Traveled uphill you the grocery store for 12 minutes at just 15 mph. I then traveled back home alone the same path downhill at a speed of 30mph. What is the average speed for the entire trip from home to the grocery store and back?

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  1. 21 August, 21:52
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    20. There are many methods to solve it. The easiest is to compute the distance, and use distance * 2 / total time
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