Distance = 5× 65× 2 = 650km.

A: The distance between A and B is 650 kilometers.

Because the leading athlete has to run 5000 meters before turning back to meet another athlete, the total distance between the two athletes is 2×5000 meters, so algebraic calculation is enough according to: meeting time = the sum of distance and speed.

Namely: 2×5000÷(320+305)= 16 (minutes).

Solution: solution: 5km = 5000m,

5000×2= 10000 (m),

10000÷(320+305),

= 10000÷625,

= 16 (minutes).

A: The two athletes met 16 minutes after the start.

Excerpt from Baidu