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 lunakhods could travel up to 2 km / hour. The lunar rovers were even faster, fastest 11 mph, and with more bandwith we could drive rovers on the Moon as fast as them from Earth. We could send vehicles like that to Mars. Lunakhod 2 was 840 kg, and Curiosity, 899 kg, so they are similar size.