Then 95x+85x=270.
180x=270
x= 1.5
95x= 142.5
A: After 1.5 hours, the two cars met on the way, and the meeting place was at the distance of Shanghai 142.5 kilometers.
It takes x minutes.
Then 280x-240x=400.
40x=400
x= 10
A: 10 minutes later, A ran one lap more than B.