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440 = 2.22/7.3,5.t
440 = 2.11(hasil dari 22/2).t
440 = 22.t
t = 440/22
t = 20 cm
Lupertab = 2
Lupertab = 2.22/7.3,5(3,5+20)
Lupertab = 22.23,5
Lupertab = 517 cm²