At a speed of 50 miles per hour, a certain car uses 1 gallon of gasoline every 30 miles. If the car starts with a full 12 gallon tank of gasoline and travels for 5 hrs at 50 miles per hour, the amount of gasoline used would be what fraction of a full tank?
a) 3/25
b) 11/36
c) 7/12
d) 2/3
e) 25/36
The correct answer if "e". I understand how that answer was derived, but why is "d" wrong? Thanks!
a) 3/25
b) 11/36
c) 7/12
d) 2/3
e) 25/36
The correct answer if "e". I understand how that answer was derived, but why is "d" wrong? Thanks!
