Question

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?

Answer 1

Just add 4+12 which equals 16 and divide by 2 to get the average.
The answer is 8mph.

Answer 2

Answer: 6 mph

Step-by-step explanation:

1. Get the distance traveled uphill:

4miles * 30minutes / 60minutes = 2 miles

2. Get the total distance traveled:

2miles * 2 = 4 miles

3. Get the time it took to travel back:

2miles * 60minutes / 12miles = 10 minutes

4. Get the average speed:

Total time: 30min + 10 min = 40 min

Total distance: 4 miles

Speed: 4miles * 60minutes / 40minutes = 6mph