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A 12inch ruler is 30cm.
If you look at a ordinary see through plastic ruler one side says 12 inches and the other, 30 centimetres by one millimeter.
Answer:
Step-by-step explanation: There are 2.54 centimeters in a inch, for every inch you need to multiply it by 2.54.
2.54 x 12 = 30.48
Answer = 30.48
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