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p:l = 3:2
L= 96 cm2
P = 3/3x2x4 x 96
= 3/24 x 96 = 12 cm
l = 2/3x2x4 x 96
= 2/24 x 96 = 8
K = 2xp + 2xl
= 2x12 + 2x8
= 24 + 16
= 40 cm
p:l = 3x:2x
L= 96 cm2
p.l=96
3x.2x=96
6x²=96
x²=16
x=4
3x=12
2x=8
k=2(p+l)
k=2(12+8)
k=40