@standupmaths

In Roger Hargrave's Mr Men series, Mr Tall is show as being mostly legs. The only bit of information we are given clearly is that he is able to walk forty miles in four minutes, is there a way we could possibly estimate how long Mr Tall's legs are from this information?

@Fontasia @standupmaths His legs would be about 24,061 feet long.

Assuming that Mr. Tall is not a competitive race walker, then the McNeill Alexander model should get us a good estimation of a novice's top speed. The formula is found in the introduction of this study:
https://www.sciencedirect.com/science/article/pii/S2095254616300151

For formula use:
Max velocity - 268.224 m/s
Leg length - 7333.752719266055 m