Answer:
1. yes, 20 miles
2. no, she was stopped between points D and E which is from 25 to 30 minutes so she waited for 5 minutes.
3. no, she turned around at point B when the distance started going back towards zero.
4. no, 30 miles, add 5 miles for when she went back home but also add another 5 miles for when she returned to the spot where she turned around.
Step-by-step explanation:
Explained above.