The Length Unit
The length unit includes meter (m), centimeter (cm), millimeter (mm), kilometer (km), micrometer (μm), nanometer (nm) and nautical mile (n mile). The relations among them are as follows:
1 m = 100 cm = 1000 mm = 10-3 km = 106μm = 109 nm
1 n mile = 1852 m = 1.852 km

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