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60 = 2 ( P + L)
P + L = 30
3x + 2x = 30 (misal x Sebagai Pembanding)
5x = 30
x = 6
Maka Panjang (3x)=3*6 = 18cm
Lebar (2x)=2*6= 12cm
Ukuran luasnya= 18*12 = 216cm²
panjang = 3x
lebar = 2x
kll = 2p x 2l
60 = (2 x 3x) + (2 x 2x)
60 = 6x + 4x
60 = 10x
x = 6
panjang = 3x = 3.6 = 18 cm
lebar = 2x = 2.6 = 12 cm
Jadi, ukuran panjangnya adalah 18 cm dan lebar 12 cm