SOLUTION: Starting at home, Emily traveled uphill to the grocery store for 20 minutes at just 6 mph. She then traveled back home along the same path downhill at a speed of 12 mph.
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Question 895513: Starting at home, Emily traveled uphill to the grocery store for 20 minutes at just 6 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? Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Average speed is always:
( total distance traveled ) / ( total time spent traveling )
Let = the one-way distance to the store
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From home to store: mi
( note that I converted minutes to hours )
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Let = time in hours to get home
From store to home: hr
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Her average speed is: mi/hr
