Stephanie M. answered 07/15/15
Tutor
5.0
(886)
Degree in Math with 5+ Years of Tutoring Experience
Since you're looking for miles per gallon, you'll want to divide the number of miles by the number of gallons.
Number of miles:
4 miles per leg × 2 legs per day = 8 miles per day
8 miles per day × 5 days = 40 miles total
Number of gallons:
3 gallons total
40 miles / 3 gallons = 13.3 miles per gallon