Analysis: 1. Distance = speed * time = distance/speed = distance/time.

If you find the appointed time, it's easy to ask. The key is to find the appointed time.

3. Find the pattern within the specified time. -Within the stipulated time.

Walk every minute15m. The extra distance is 60 * 5+75 * 2 = 450m, and the stipulated time is 450/15 = 30min.

Solution: 60 * [(6085+75 * 2)/(75-60)]+60 * 5 = 60 * 30+60 * 5 = 2100m.

Or 75 * [(6085+75 * 2)/(75-60)]-75 * 2 = 75 * 30-75 * 2 = 2100m.

Answer: 2 100m.