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Koľko váži olovený štvorsten s hranou 5cm?
Hustota olova: ρ = 11340kg/m3
Sklenená pyramída v Louvri má výšku 20,6m a hrana jej štvorcovej podstavy má dĺžku 35m. Koľko m2 skla sa spotrebovalo na jej zasklenie, ak nepočítame plochu konštrukcie?
Nálevkou (lievik), ktorá má tvar rovnostranného kužeľa (prierez je rovnostranný trojuholník (dolný otvor zanedbajte) s priemerom 15 cm máme naplniť 25-litrový demižón. Koľkokrát musíme lievik…
Koľko m2 pozinkovaného plechu sa spotrebuje na pokrytie strechy domu s obdĺžnikovým pôdorysom s rozmermi 10m a 8m, výškou strechy 5m, ak počítame s 5%-ým odpadom?
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