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Une pièce métallique en cuivre à un volume de 2,5dm cube et une masse de 22.3kg. De plus on sait que 1kg d'aluminium occupe un volume de 370cm cube et que la masse volumique de l'acier est de 7850 kg/m cube. Calcule en kg la masse d'un décimètre cube de chacun de ces métaux
Sagot :
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