Starting at home, Emily traveled uphill to the hardware store for 60 minutes at just 6 mph. She then traveled back home along th
e same path downhill at a speed of 12mph. What is her average speed for the entire trip from home to the hardware store and back?
2 answers:
Answer:
should be 9 if im correct!! lmk if not
Step-by-step explanation:
At a 6mph speed, it took Emily 60m
If she returns at a speed of 12mph, it'll take half the time so 30m.
The total of time she took to travel is
30m+60m=90m
the 6mph part represents 2/3 of the time
and the 12mph part reprensents 1/3 of the time
So then
(2/3•6)+(1/3•12)=8
So Emily has an average of 8mph for the entire ride
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