The expressway from a to B is about 240000 meters long. A car and a bus start from a to B at the same time. When the car arrives at B, how many kilometers away is the bus from B

The expressway from a to B is about 240000 meters long. A car and a bus start from a to B at the same time. When the car arrives at B, how many kilometers away is the bus from B

40000 meters

Xiao Wang planned to drive from a to B in 5 hours, and then he drove 9 kilometers more per hour than the original plan. As a result, he got to B in 4 hours. How many kilometers is the distance between a and B
Solve by equation

Let a and B be x km apart
x÷5+9=x÷4
4x+9×20=5x
5x-4x=9×20
x=180
A: A and B are 180 km apart