A train with a speed of 30 km/h is driving in front of a train with a speed of 50 km/h. It is assuMed that after 15 minutes, the latter can catch up with the preceding one. How many kilometers iS the current distance between the two trains? ( )
A、 8
B、 5
C、 13
D、 9
发布时间：2025-09-02 23:05:36
