The distance between a and B is 15 kilometers. Car a travels 50 kilometers per hour, and car B travels 40 kilometers per hour. At the same time, they are facing each other, How many hours later are the two cars 30 kilometers apart?

The distance between a and B is 15 kilometers. Car a travels 50 kilometers per hour, and car B travels 40 kilometers per hour. At the same time, they are facing each other, How many hours later are the two cars 30 kilometers apart?

Meet (line of 15 kilometers) after the distance of 30 kilometers is the subject condition
Answer: (30 + 15) / (50 + 40) = 1 / 2 (hour)

The speed of a is 40 km / h and that of B is 60 km / h. The time ratio of a and B is ()

The speed of a is 40 km / h and that of B is 60 km / h. The time ratio of a and B is (3:2)

When a and B vehicles travel the same distance, the speed of a is 40 per hour and that of B is 60 per hour

Let the distance be s, then the time used by a is T1 = s / 40, the time used by B is T2 = s / 60, and their time ratio is T1: T2 = 3:2

A and B drive from a to B at the same time. When a finishes 13 o'clock, B is 60 kilometers away from B. at this speed, when a arrives at B, B finishes 67. How many kilometers are there between a and B?

A: the distance between a and B is 84 km