The distance between a and B is 305 km. The speed of car a from a to B is 70 km / h. 20 minutes after car a starts, car B from B to a is 60 km / h. how long after car a starts, the distance between the two cars is 65 km?

The distance between a and B is 305 km. The speed of car a from a to B is 70 km / h. 20 minutes after car a starts, car B from B to a is 60 km / h. how long after car a starts, the distance between the two cars is 65 km?

There are two situations in this question
(1) The two vehicles did not meet:
If car a runs for X hours, then: 60 (x-1 / 3) + 70X = 305-65
The solution is: x = 2
A: car a has been running for 2 hours
(2) After the two vehicles meet:
If car a runs for X hours, then: 60 (x-1 / 3) + 70X = 305 + 65
The solution is: x = 390 / 130 = 3
A: car a has been running for three hours

The speed of car a and car B is 80km / min and 60km / min from a to B at the same time. Car a is 5min earlier than car B. find the distance between a and B

Suppose the distance is X
So x / 60-x / 80 = 5
4x/240-3x/240=5
x=5×240
X = 1200 km
So the answer is 1200 kilometers

Both Party A and Party B go from place a to place B. Party A walks at a speed of 5km / h for one hour; Party B rides a bicycle at a speed of 15km / h for another hour______ H & nbsp; catch up with a

Let B catch up with a in X hours. According to the meaning of the question: 5 (1 + x) = 15x, the solution is: x = 0.5

Both Party A and Party B go from place a to place B. Party A walks at a speed of 5km / h for one hour; Party B rides a bicycle at a speed of 15km / h for another hour______ H & nbsp; catch up with a

Let B catch up with a in X hours. According to the meaning of the question: 5 (1 + x) = 15x, the solution is: x = 0.5