Two cars, big and small, drive from a to B at the same time. When the small car reaches 12 o'clock in the whole journey, the big car runs 48 kilometers. At this speed, when the small car reaches B, the big car runs 45 kilometers in the whole journey. How many kilometers are there between a and B?

Two cars, big and small, drive from a to B at the same time. When the small car reaches 12 o'clock in the whole journey, the big car runs 48 kilometers. At this speed, when the small car reaches B, the big car runs 45 kilometers in the whole journey. How many kilometers are there between a and B?

A: the distance between a and B is 120 km

How many hours does it take for a car to travel from a to B in three hours

If it takes x hours to complete the whole process, the proportional formula is as follows
3:1/4=x:1
X = 3 * 4 = 12 hours