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Obw koła = 6cm
H=10cm
Pbwalca = H×Obw
Pb = 10cm × 2πr
Pb = 10cm × 2π×6cm
Pb = 120πcm² = 1,2πm²
1,2πm² ×5000 = 6000πm²
6000πm² = 6000 × 3,14m² = 18840m²
Odp: Potrzeba 18840m² papieru.