The distance between two consecutive meridians near the equator is

Earth's circumference at the equator is approximately 40,075 km. With 360 degrees of longitude, each degree spans about 111.3 km at the equator (40,075 / 360 = 111.3 km). This is a standard geographical fact and an important value for understanding the scale of Earth's coordinate system. The distance between meridians decreases as you move toward the poles due to the convergence of longitude lines.