Physical quantities are measured as 'nu' where n is the magnitude and u is the unit. For example: A boy measured the length of a room as 3 m. Here 3 is the magnitude and m (metre) is the unit. 3 m can also be written as 300 cm.
No. The only European units I know of who were able to sustain that. kind of speed on foot were Foreign Legion-where the standard was 50. km per day. Other infantry units usually come in under 20 miles a day. (and closer to 12-15 miles per day).
The Moon's speed through the shadow during a lunar eclipse is about one kilometer per second (2,300 mph) and I suppose that would be the speed of its shadow on Earth too. As the earth continues to rotate, the umbra sweeps across the surface from west to east at a speed of about 1600 kilometers an hour.