Question: In 1 km races, runner 1 on track 1 (with time 2 min, 27 .95 s) appears to be faster than runner 2 on track

In 1 km races, runner 1 on track 1 (with time 2 min, 27 .95 s) appears to be faster than runner 2 on track 2 (2 min, 28.15 s). However, length L2 of track 2 might be slightly greater than length L1 of track 1. How large can L2 – L1 be for us still to conclude that runner 1 is faster?

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