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maka:
p= 5x
l= 4x
t= 3x
V. balok= 1.620 cm³
V.balok= p × l × t
1.620= 5x × 4x × 3x
1.620= 60x³
1.620 / 60= x³
27= x³
x= ∛27
x= 3
Maka, ukuran balok tersebut adalah :
p= 5x
= 5(3)
= 15 cm
l= 4x
= 4(3)
= 12 cm
t= 3x
= 3(3)
= 9 cm