Question 2: The last time of player 19 1 was 1997+75=2072 seconds, and the last time of player1503+165438 =16668. T seconds later 19 1 catch up 194, the equation is 8.12 * x = 7.03 * 459+7.03 * x.x = 2960.34 seconds, because x can be solved.
Question 3: The total time before191is1997+75+4927+40 = 7039; The total time before 194 is1503+1/kloc-0+5686+57 = 7356; The total time before 195 is1354+74+5351+44 = 6823; It can be seen that after the first two items, 195 is the first, leading the second 19 1 2 16 seconds, and the second leading the third 194 3 17 seconds; Let's consider whether the third can catch up with the second, v3 =10000/3652 = 2.14, v2 =10000/3220 = 3.1kloc-0/. The latter is slower than the former, so it is impossible to catch up. Then consider whether the second one can catch up with the first one, which is slower than the former and impossible to catch up with.
To sum up, in the long-distance running, no one can catch up with the person in front.