At 10 o'clock, the distance between car a and station a is three times that between car B and station a At 10 o'clock, the distance between car a and station a is three times that between car B and station A. at 10:10, the distance between car a and station a is twice that between car B and station A. Q: when did car a start from station a? We need a formula

At 10 o'clock, the distance between car a and station a is three times that between car B and station a At 10 o'clock, the distance between car a and station a is three times that between car B and station A. at 10:10, the distance between car a and station a is twice that between car B and station A. Q: when did car a start from station a? We need a formula

Suppose the speed of car a and car B is x, car a drives for 3 T minutes at 10 o'clock, car B drives for t minutes, the distance between car B and station a is s at 10 o'clock, and the distance between car a and station a is 3S,
2（m+10x）=3m+10x
So m = 10x, x = m / 10
3t=3m/x=3m/（m/10）=30min
So car a took 30 minutes
So car a starts at 9:30

[physics of Grade 8] the distance between the two cars is 20m. (a is in the front, B is in the back) a starts 2 seconds earlier than B, with a speed of 2m / s, and B's car is 3m / s. how long does it take to catch up?

（20+2*2）/（3-2）=24s

Car a moves in a straight line at a constant speed v. when passing a stopped car B, car B moves in a straight line at a constant speed to catch up with car a
A. When the speed of car B is V, catch up with car A. B. when the speed of car B is V, the distance from car a is the farthest. C. when the speed of car B is 2V, catch up with car A. D. according to the conditions given in the question, we can find out the time it takes car B to catch up with car a

The speed time graph of car a and car B is as shown in the figure. When car B overtakes car a, the displacement is equal. It can be seen from the image that when the displacement of car a and car B is equal, the speed of car B is 2V. From the image, it is impossible to know the time taken by car B to overtake car a, and the distance between two cars when car B overtakes car a C is correct, ad is wrong