centi (as in centimeter) means hundredth milli (as in millimeter) means thousandth
400 thousandths of a meter equals 40 hundredths of a meter
400mm = 40cm
Pretty easy hunh?
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40cm
40 cm.
There are 10 mm in 1 cm. Therefore by moving the decimal place over by one 400mm equals 40 cm.So 51 is greater than 40, yes 51 cm is greater than 400mm.
1125
0.4m2