J'ai trois barre metallique L=90 cm ,l=60 cm ,h=20 cm ,masse =291,6 kg L=130 cm ,l= 60 cm,h= 20 cm,masse =1,2168t
L=7 cm;l=6cm ,h=5 cm ,masse =2,205kg
calcul le vomumique pour chaque barre
et donner la nature du métal constituant chaque barres MERCI
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