A and B two cars respectively from a, B two places at the same time relatively open 5 hours meet, meet the distance ratio is 3; 2, how many hours to complete the whole journey?

A and B two cars respectively from a, B two places at the same time relatively open 5 hours meet, meet the distance ratio is 3; 2, how many hours to complete the whole journey?

3+2=5
Fast 5 / (3 / 5) = 25 / 3 = 8 hours 20 minutes
Slow 5 / (2 / 5) = 25 / 2 = 12 hours 30 minutes

A. The distance between city B and city a is 360km. Cars a and B leave from a and B at the same time. The two cars meet in three hours
The speed ratio is 7:5. What's the speed of the car?
RT.

360 △ 3 = 120 (km / h)
Car a: 120 ÷ (7 + 5) × 7 = 70 (km / h)
Car B: 120 ÷ (7 + 5) × 5 = 50 (km / h)
A: car a travels 70 kilometers per hour, car B travels 50 kilometers per hour
Or:
Driving distance of vehicle a: 360 △ (7 + 5) × 7 = 210 (km)
Speed of car a: 210 △ 3 = 70 (km / h)
Driving distance of vehicle B: 360 ÷ (7 + 5) × 5 = 150 (km)
Speed of vehicle B: 150 △ 3 = 50 (km / h)
A: car a travels 70 kilometers per hour, car B travels 50 kilometers per hour

A, B two cars respectively from a, B two places at the same time relatively open 5 hours meet, meet the distance ratio is 3:2, finish the whole journey in how many hours?

25 / 3 hours for a and 25 / 2 hours for B
Let a use x hours, B use y hours, then according to the known velocity ratio is 3:2, then 2Y = 3x
Let's set the distance at 1
5/X + 5/Y =1
Solving equations

The speed of car a from a to B is 60km / h, and that of car B from B to a is 90km / h. The distance between the two places is 200km. How far is a from where the two cars meet

It took 200 / (60 + 90) = 4 / 3 hours for the two cars to meet
At this time, Li a has (4 / 3) * 60 = 80km