If the speed ratio of a and B cars moving in a uniform straight line is 3:4 and the distance ratio is 6:5, then the movement time ratio of the two cars is () A. 9：10B. 5：3C. 5：8D. 8：5

If the speed ratio of a and B cars moving in a uniform straight line is 3:4 and the distance ratio is 6:5, then the movement time ratio of the two cars is () A. 9：10B. 5：3C. 5：8D. 8：5

According to the velocity formula v = st, t a = s a V A, t b = s b v b t a, t b = s a v b s b v a = 65 × 43 = 85, so D is selected

If the ratio of the moving time of the two cars moving in a uniform and straight line is 4:3 and the ratio of the passing distance is 6:5, then the moving speed of the two cars is 4:3

Analysis:
According to v = s / T
V A / v b = (s a / t a) / (s B / t b) = (s a / S B) / (t a / t b)
So the speed ratio of a and B is V A / v b = (6 / 5) / (4 / 3) = 18 / 20 = 9 / 10

How much is the distance ratio if the speed ratio is 5:4 and the time ratio is 4:3

Distance = speed * time
（5*4）/（4*3）=5：3

The speed ratio of car a to car B is 4:5. The ratio of the time taken by car B to car a to complete the same journey is 4:5______ ．

Take the distance as a whole "1"; the ratio of the time spent by car B and car a is: 15:14 = 4:5; so the answer is: 4:5