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A decimeter (dm) is 10 centimeters (cm), so 400 dm would be larger.
1 dm = 1 cm → 1 dm² = 1 dm × 1 dm = 10 cm × 10 cm = 100 cm² → To convert dm² to cm² multiply by 100 → 5 dm² = 5 × 100 cm² = 500 cm².
Since, 10 cm = 1 dm , 10 cm x 10 cm x 10 cm = 1 dm x 1 dm x 1 dm , Then, 1000 cm^3 = 1 dm^3
1 dm = 10 cmso, (1 dm)2 = (10 cm)2 = 100 cm2
1 cm = 10 mm = 0.01 m = 0.1 dm 1 mm = 0.1 cm = 0.001 m = 0.01 dm 1 m = 100 cm = 1000 mm = 10 dm 1 dm = 10 cm = 100 mm = 0.1 m