Consulting an Expert —— An Interesting Problem of Walking Back and forth in Mathematics

This is a question of the number of encounters.

Time for Dagang to walk 100 meters: 100/2.6=500/ 13 seconds,

The time of floret walking 100 m:100/2.2 = 500/11sec,

30 minutes, Dagang walk: 30*60/500/ 13=46.4.

Xiaohong Zuo: 30 * 60/500/11= 39.6.

Because the common multiples of 500/13,500/1are not within 30*60= 1800 seconds, I have met Xiaohong once in every whole journey of Dagang, with 46 times.

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