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3750 = 30a³
a³ = 3750/30 = 125
a = 5 cm
panjang = 5 x 5 = 25 cm
p = 5x
l = 2x
t = 3x
V = p × l × t
3750 = 5x × 2x × 3x
3750 = 30x³
125 = x³
∛125 = ∛x³
5 = x
p = 5x
= 5(5)
= 25 cm
Jadi panjang balok tersebut adalah 25 cm.