Explicație pas cu pas:
V = 3×2×8 = 48 cm^2
L = 20 cm = 200mm
V= 200×9×40 = 72000mm^2
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Explicație pas cu pas:
V = 3×2×8 = 48 cm^2
L = 20 cm = 200mm
V= 200×9×40 = 72000mm^2