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Anything that measures length: a 30cm ruler, a metre ruler, a tape measure etc.
Depending on the size of it id say either a 15cm ruler or a 30cm ruler.
Depending on the size of it id say either a 15cm ruler or a 30cm ruler.
a 30cm ruler
30cm is about 12 inches or 1 foot in length
20g
First you convert 0.3m into 30cm because 0.3cm is out of 10dm then you start at the end of the ribbon and measure up to 30cm and mark that with your finger and there you go cut where you marked it and there is 30cm r if you have a better answer please help i dont know if this is good I'm only 10 Grade 5Quite easily - 30cm is exactly the same measurement as 0.3 metres !
The scale is assumed to expand and contract with the solid - you cannot measure a solid with a 30cm ruler from another continent.
A 30cm Ruler.
Look at a ruler, if you don't know....
Yes.
In a standard 30cm ruler there are 300mm (discluding the bits at the end of the rulers which are unmarked).