m=300 g
densitatea argintului=2,69g/cm (cub)
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V=?
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densitatea=m/v=> V= m/densitate=300g/2,69g/cm(cub)=111,52 cm (cub)
V=0,5cm cub
densitatea=11,34 g/cm cub
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m=?
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densitatea=m/V=> m=V*densitate=0,5cm cub*11,34g/cm cub=5,67g
densitatea=7,8g/cm cub
m=6,3 kg= 6300g
l=15 cm
h=2 cm (grosimea)
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L=?
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densitatea=m/V=> V=m/densitate= 6300g/7,8g/cm cub= 807,69cm cub
l*L*h=V
15cm*2cm*L=807,69cm cub
30cm patrat=807,69cm cub=> L= 807,69 cm cub/ 30 cm patrat= 26,92 cm