Two people, A and B, start to run in opposite directions from a certain point along a circular track. It is known that A’s speed is 80% of B’s. After meeting each other for 10 minutes, they continue to run forward. How many minutes will it take for A to return to the starting point?
甲、乙二人沿一环形跑道从某点开始反方向跑步，已知甲的速度是乙的80%，经过10分钟相遇后各自继续向前跑，问甲跑回开始点还需几分钟？
<result>12.5</result>