Starting at home, Emily traveled uphill to the hardware store for 60 minutes at just 6 mph. She then traveled back home along th

Question

3 years ago

12

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?

Mathematics

2 answers:

Aleks [24] · Answer 1 · 2021-11-11T01:26:39+03:00

Aleks [24]3 years ago

4 0

Answer:

should be 9 if im correct!! lmk if not

Step-by-step explanation:

saveliy_v [14] · Answer 2 · 2021-11-11T03:36:09+03:00

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