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Pb=2x 18x10 + 2x 5x10
Pb=360 + 100
Pb= 460cm²
Pc= Pp + Pb
Pc= 2 x18x5 + 460
Pc= 180+460
Pc= 640 cm²
2
35mm=3,5cm
Pb= 4 x 3,5x2,6
Pb=36,4
Pc= Pb= Pp
Pc= 36,4 + 2x 2,6x2,6
Pc=49,92