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5x * 4x * 3x = 1620
60x³ = 1620
x³ = 1620 / 60
x³ = 27
x = ∛27
x = 3
Panjang = 5 * 3 = 15 cm
Lebar = 4 * 3 = 12 cm
Tinggi = 3 * 3 = 9 cm
p = 5x
l = 4x
t = 3x
V = p × l × t
1620 = 5x × 4x × 3x
1620 = 60x³
27 = x³
∛27 = ∛x³
3 = x
p = 5x
= 5(3)
= 15 cm
l = 4x
= 4(3)
= 12 cm
t = 3x
= 3(3)
= 9 cm
Jadi ukuran balok adalah p × l × t = 15 cm × 12 cm × 9 cm.