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lebar = 4a
tinggi = 3a
Luas permukaan = 2(pl + pt + lt)
72 × 6 = 2(6a(4a) + 6a(3a) + 4a(3a))
432 = 2(24a2 + 18a2 + 12a2)
216 = 54a2
216/54 = a2
4 = a2
a = 2
panjang = 6(2) = 12 cm
lebar = 4(2) = 8 cm
tinggi = 3(2) = 6 cm
Volume = panjang × lebar × tinggi
= 12 × 8 × 6
= 12 × 48 = 576 cm3
Jadi, volumenya adalah 576 mililiter