Vreau rezolvare,nu doar raspunsul!
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Răspuns:
6 litri = 6 dm³ = 6000 cm³
inaltimea apei initial = 6000/20² cm
volum piatra = 1000 cm³
volum apa + piatra = 7000 cm³
inaltimea apei final= 7000/20² cm
diferenta de nivel apa = 1000/20² = 2.5 cm
raspuns corect: b) 2.5 cm