To convert millimeters (mm) to centimeters (cm), you need to divide by 10 since there are 10 millimeters in a centimeter. Therefore, 30mm is equal to 3cm. This conversion is based on the metric system where units are related by powers of 10.
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By unit of length and distance and conversion ,we can say that 1 mm=0.1 cm 30 mm=3 cm
a lot.
Smaller 3cm = 30mm so 8mm is 22mm smaller than 30mm or 3cm
30mm
30mm !