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21 May, 16:30

Starting at home, nadia traveled uphill to the grocery store for 30 minutes at just 4 mph. she then traveled back home along the same path downhill at a speed of 12 mph. what is her average speed for the entire trip from home to the grocery store and back?

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  1. 21 May, 17:37
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    Just add 4+12 which equals 16 and divide by 2 to get the average.

    The answer is 8mph.
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