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3750=3x.2x
3750=6x^2
x^2=3750/6
x^2=625
x=akar 625 = 25
Panjang = 3.25=75 cm
Lebar=2.25=50 cm
Keliling=2(p+l)=2(75+50)=2.125=250 cm
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3a x 2a = 375
5a² = 375
a² = 375/5
a = √75
a = 5√3
panjang = 3 x 5√3 = 15√3
lebar = 2 x 5√3 = 10√3
kliling
K = 2 ( p + l )
= 2 ( 15√3 + 10√3)
= 2 ( 25√3)
= 50 √3 cm