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V = p x l x t = 20 x 7 x 2 = 280
V = p x l x t = 5 x 7 x 8 = 280
20. alas balok persegi, panjang sisi = 12, maka p dan l sama yaitu 12.
V = p x l x t
4464 = 12 x 12 x t
4464 = 144 x t
t = 4464 : 144
t = 31 cm
klo nomer 20 aku gak tau