Earth's circumference mile in the seventeenth century and the metre in the eighteenth. Earth's polar circumference is almost exactly 40,000 km because the metre was originally calibrated on this measurement (1/10-millionth of the distance between the poles and the equator), which is almost exactly 21,600 nautical miles (being defined as one minute of a degree – i.e. 360 multiplied by 60). It has been described as "the single most important measurement" of the Earth, assuming the Earth to be a sphere (the Earth is an technically an ellipsoid, albeit with just 0.3% flattening). Earth's circumference lines are the foundation of the coordinate
Methods-time measurement MTM is TMU (time measurement unit): 1 TMU = 36 milliseconds ; 1 hour = 100,000 TMU 1 TMU = 0.036 second depending on length one TMU=0.032 Methods-time measurement Methods-Time Measurement (MTM) is a predetermined motion time system that is used primarily in industrial settings to analyze the methods used to perform any manual operation or task and, as a product of that analysis, set the standard time in which a worker should complete that task. MTM was released in 1948 and today exist in several variations, known as MTM-1, MTM-2, MTM-UAS, MTM-MEK and MTM-B. Some MTM standards are obsolete;