Arturo O. answered 03/24/20
Experienced Physics Teacher for Physics Tutoring
For both cars divide the distance traveled by the time. That will give the speeds. Then compare the speeds.
Car A:
speed = (500 m) / (3.4 s) = 147 m/s
Car B:
speed = (750 m) / (4.8 s) = 156 m/s
Car B is faster.