There are 10 millimetres in one centimetre. Therefore, 420 millimetres is equal to 420/10 = 42 centimetres.
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420mm is bigger.
There are 10 mm to a cm so just times the number by ten, so 420mm = 4.2cm :)
420mm x 594mm or 42cm x 59.4cm
Yes because there is 10 mm in 1 cm so 42 x 10 is 420
Eight cm is equal to how many mm