jwb
luas permukaan balok = 2 x p x l + p x t + l x t
712 = 2 x 13 x 12 + 13 x t + 12 x t
= 2 x 156 + 25t
= 312 + 50t
50t = 400
= 8 (tinggi)
volume = p x l x t (balok)
= 13 x 12 x 8
= 1.248
volume balok = 1.248 cm3
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jwb
luas permukaan balok = 2 x p x l + p x t + l x t
712 = 2 x 13 x 12 + 13 x t + 12 x t
= 2 x 156 + 25t
= 312 + 50t
50t = 400
= 8 (tinggi)
volume = p x l x t (balok)
= 13 x 12 x 8
= 1.248
volume balok = 1.248 cm3