Well, sweetheart, 3000 mm is the bigger one here. Why? Because 30 cm is the same as 300 mm, and 3000 mm trumps that. So, in this case, size does matter.
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There are 10 millimetres in one centimetre. Therefore, 30 centimetres is equal to 30 x 10 = 300 millimetres. This is one tenth of 3000 millimetres.
1 cm = 10 mm3.4 cm = (3.4 x 10) = 34 mmSo 3.4 cm is 4 mm bigger than 30 mm.
3.4 cm
34 cm as it equals 340 mm
3000 mm=300 cm. 10 mm=1 cm. 32 cm=320 mm.
1 cm = 10 mm 2 cm = 20 mm . . . 9 cm = 90 mm 10 cm = 100 mm 20 cm = 200 mm 30 cm = 300 mm