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p = 3x
l = x
t = 2x
V = p × l × t
750 = 3x × x × 2x
750 = 6x³
125 = x³
∛125 = ∛x³
5 = x
p = 3x
= 3(5)
= 15 cm
l = x
= 5 cm
t = 2x
= 2(5)
= 10 cm
LP = 2(p × l) + 2(p × t) + 2(l × t)
= 2(15 × 5) + 2(15 × 10) + 2(5 × 10)
= 2(75) + 2(150) + 2(50)
= 150 + 300 + 100
= 550 cm²
L = p × l
= 30 cm × 20 cm
= 600 cm²
Sisa = L Kertas - LP Balok
= 600 - 550
= 50 cm²