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langsung aja dimasukin angkanya ,
terus, nanti dibalik angkanya
maaf , semoga bisa membantu
L.p = (2Πr × t) + 2(Π×r×r)
L.p - 2(Π×r×r) = (2Πr × t)
t = (L.p - 2(Π×r×r)) / 2Πr
tinggi = (Luas permukaan - 2(luas alas)) / keliling alas