Tienidlo stolovej lampy má tvar kužeľa s priemerom podstavy d = 3,5 dm a telesovou výškou v = 11 cm. Koľko cm2 pergamenu spotrebujeme na výrobu tienidla ak 2,3% sa počíta na prelepenie. Určte dĺžku drôtu zaokrúhlenú na celé centimetre na vystuženie podstavnej hrany.
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