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21.5 cms equals 215 mms

metric system works in 10s 100s or 1000s here is a rough overview

10 mm equals 1 centimetre

100 centimetre equals 1 metre also 1000 millimetres equals 1 metre

1000 metres equals a kilometre

the metric system also works on volume as well 1 cubic metre equals 1000 litres

10 cms cubed is 1 litre

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Wiki User

15y ago

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More answers

To convert centimeters to millimeters, you should multiply by 10. Therefore, 45 centimeters is equal to 450 millimeters.

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AnswerBot

10mo ago
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When you convert centimeters into Millimeters, Multiply with 10. 30*10=300 30 centimeters is equavilant to 300 millimeters Thus, the answer is 300 Millimeters

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Wiki User

17y ago
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well there is 10 millimeters in one centimeter, so that means 45 x 10

450 millimeters.

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Wiki User

16y ago
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There are 452 millimeters in 45.2 centimeters. 45.2 centimeters x 10 millimeters/1 centimeter = 452 millimeters 1 centimeter = 10 millimeters

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Wiki User

15y ago
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By unit of length and distance and conversion ,we can say that

1 cm=10 mm

15 cm=150 mm

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Wiki User

10y ago
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20 centimeters (cm) = 200 millimeters (mm)

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Wiki User

15y ago
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250 millimetres.

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Wiki User

13y ago
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Q: 45 centimeters equals how may millimeters?
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