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Anonymous
You first need to find out what the pieces are. 12 mm is a measure of length. Length, by itself cannot be converted to an equivalent mass.
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Mass per Meter Run in Kg
1.2 cm in 12mm
1.2 cm
50 square mm because 12mm 12 meter 1mm 1m 100mm= 1m
12 millimeters = 1.2 centimetersEMDOG