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L = 96 cm²
perbndingn p : l = 3 : 2
fktor pengali = y
maka :
L = p x l
96 = 3y x 2y
96 = 6y²
y² = 96/6
y = √16
y = 4 cm
jdi :
pnjang = 3 x 4 = 12 cm
lebr = 2 x 4 = 8 cm
K = 2 x (p+l)
= 2 x (12+8)
= 40 cm
p = 3y
l = 2y
L = p x l
96=3y x 2y
6y^2=96
y^2 = 16
y = 4
maka:
p=3y = 3x4=12 cm
l=2y = 2x4 = 8
Jadi
K=2(p+l)
=2(12+8)
=2 x 20
= 40 cm