A math problem, I hope to explain it If they start at the same time and meet each other for the first time when B runs 100 meters and the second time when a runs 60 meters short of a lap, how long is the runway

A math problem, I hope to explain it If they start at the same time and meet each other for the first time when B runs 100 meters and the second time when a runs 60 meters short of a lap, how long is the runway

Set runway length x first encounter a X / 2-100 B 100
The second meeting a X-60 B x / 2 + 60
The same speed, the same time
(x/2-100)/(x-60)=100/(x/2+60) x=480