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Mathematics in sprint
The speed ratio of Nong Yu and Zhang Hui is 2: 3 = 8: 12.

The speed ratio between Zhang Hui and Zhao Xiang is 4: 5 = 12: 15.

First place: Zhao Xiang.

Second place: Zhang Hui

Third place: Nong Yu.

The speed ratio among them is 15: 12:8.

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