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panjang = 3x
lebar = 2x
L = p.l
96 = 3x.2x
96 = 6x²
x² = 96/6
x = √16
x = 4
Panjang = 3x = 3.4 = 12 cm
lebar = 2x = 2.4 = 8 cm
Keliling = 2 (p+l) = 2 (12+8) = 2x20 = 40 cm
p : l = 3 : 2
p = 3a
l = 2a
L = p × l
96 = 3a × 2a
96 = 6a²
16 = a²
√16 = √a²
4 = a
p = 3a
= 3(4)
= 12 cm
l = 2a
= 2(4)
= 8 cm
K = 2(p + l)
= 2(12 cm + 8 cm)
= 2(20 cm)
= 40 cm
Jadi keliling persegi panjang tersebut adalah 40 cm.