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panjang = 5x
lebar = 4x
tinggi = 3x
volume = p x l xt
1620 = 5x . 4x . 3x
1620 = 60x³
1620/60 = x³
27 = x³
∛27 = x
3 = x
panjang = 5x lebar = 4x tinggi = 3x
= 5(3) = 4(3) = 3(3)
= 15 cm = 12 cm = 9 cm
jadi ukuran balok adalah 15cmx12cmx9cm