Mathematics, 09.10.2019 00:30 ronalescobar2002

Starting at home, jessica traveled uphill to the grocery store for 18 minutes at just 20 mph. she then traveled back home along the same path downhill at a speed of 60mph.
what is her average speed for the entire trip from home to the grocery store and back?

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Starting at home, jessica traveled uphill to the grocery store for 18 minutes at just 20 mph. she th...