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l = 2n
t = n
luas permukaan = 2(pl + pt + lt)
550 = 2(3n.2n + 3n.n + 2n.n)
550 = 2(6n² + 3n² + 2n²)
550 = 2.11n²
550 = 22n²
n² = 550/22
n = √25
p = 3n = 3.25 = 75
l = 2n = 2.25 = 50
t = n = 25
volume = p.l.t
= 75.50.25
= 93750 m³