Sabrina road her horse into town 16 miles away. On the way back, Sabrina raced home which doubled her speed. If her total travel time was 6 hours, how fast did she travel in each direction?
a. 4 mph to town, 8 mph to home b. 8 mph to town, 4 mph to home
c. 5.33 mph both ways d. 2.67 mph both ways