40 dm = 400 cm
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There are 10 centimetres in one decimetre. Therefore, 40 decimetres is equal to 40 x 10 = 400 centimetres.
4 meters is 40 dm (decimeters), yes More popular use is of 400 cm centimeters or 4000 mm (milimeters)
1 dm = 10 cm so 4 dm = 40 cm...
1 cm is equal to 10 dm
40dm