A and B run a 5 km race on a round course of 400 m. If their speed are in the ratio 5: 4, the number of times, the winner passes the other ,is

A and B run a 5 km race on a round course of 400 m. If their speed are in the ratio 5: 4, the number of times, the winner passes the other ,is
1). 1
2). 2
3). 3
4). 5

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