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πr²=3,14*10000=31400cm²
31400*700cm=21980000cm³
Objętość małego walca:
πr²=3,14*6400=20096cm²
20096*700cm=14067200cm³
21980000cm³ - 14067200cm³ =7912800cm³=7,9128m³
Odp:Potrzebuje 7,9128m³.