The distance between the two cities is 225 km. A bus and a truck leave the two cities at the same time. They meet in 2 / 3 hours. The speed of train and bus is 9:11

The distance between the two cities is 225 km. A bus and a truck leave the two cities at the same time. They meet in 2 / 3 hours. The speed of train and bus is 9:11

225 / 2 / 3 = 675 / 2km
Bus speed: 675 / 2 * (11 / 9 + 11) = 185.625km
Truck speed 675 / 2 * (9 / 9 + 11) = 151.875km

The length of the railway between the two cities is 435 km. The passenger and freight trains run from the two cities at the same time and face each other. The passenger train runs 60 km per hour and the freight train 45 km per hour. The length of the railway between the two cities is 435 km. The passenger and freight trains run from the two cities at the same time and face each other. The passenger train runs 60 km per hour and the freight train runs 45 km per hour, One yuan. Thank you

After X hours, the distance between the two vehicles is 15 km
X(60+45)=435-15
105X=420
X=4
Four hours later, the two cars were 15 kilometers apart