4000km

4000km, or four thousand kilometers, is a distance measurement equivalent to approximately 2485 miles or 2160 nautical miles. It is a significant distance in various contexts, including geography, transportation, and sports.

In geography, 4000km is roughly the distance between major cities such as New York and Madrid, or between Tokyo and Beijing. It is also the approximate circumference of the Earth at the equator, divided by the number of time zones.

In transportation, 4000km is a common range for electric vehicles, indicating the distance a vehicle can travel on a single charge. It is also a typical distance for long-haul flights, such as those between North America and Europe.

In sports, 4000km is the distance covered in the marathon, a popular long-distance running event. It is also the distance of the Ironman Triathlon's bike leg.

4000km is a versatile measurement that can be applied to various fields, reflecting the scale of human activities and the size of our planet.