30 cm
1 centimeter = 10 millimeters
1 millimeter = 0.1 centimeter
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300 millimeters is equal to 30 centimeters. To convert millimeters to centimeters, divide by 10 since there are 10 millimeters in one centimeter.
30 cm is equal to 300 mm.
A standard ruler is typically 30 centimeters long, which is equal to 300 millimeters. So there are 300 millimeters in a typical ruler.
30 centimeters = 300 millimeters.
There are 30 centimeters in 300 millimeters. This is because there are 10 millimeters in one centimeter.
There are 300 millimeters in 30 centimeters.