The two passenger and freight cars leave from the two places at the same time. After two hours of meeting, the distance ratio between the passenger car and the freight car is 2:5. The passenger car travels 40 kilometers per hour, and the freight car travels how many kilometers per hour Another way is that for a project, Party A and Party B need to complete it in six days. It is known that 1 / 2 time for Party A to complete this work alone is equal to 1 / 3 time for Party B to complete this work. How long does it take for Party A to complete this work alone?

The two passenger and freight cars leave from the two places at the same time. After two hours of meeting, the distance ratio between the passenger car and the freight car is 2:5. The passenger car travels 40 kilometers per hour, and the freight car travels how many kilometers per hour Another way is that for a project, Party A and Party B need to complete it in six days. It is known that 1 / 2 time for Party A to complete this work alone is equal to 1 / 3 time for Party B to complete this work. How long does it take for Party A to complete this work alone?

The speed of the truck is:
40÷2x5
=20x5
=100 (km / h)
A: trucks travel 100 kilometers per hour
The man hour ratio of Party A and Party B is 1 / 3:1 / 2 = 2:3
The work efficiency ratio of a and B is 3:2
The usage time of a is:
1÷[1/6x3/(2+3)]
=1÷1/10
=10 (days)