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Diasumsikan p=2l
2p+2l=66
2p+p=66
3p=66
p=22
Karena p=2l kita dapat l=1/2p=1/2*22=11
Jadi, ukuran persegi panjang tersebut lebarnya 11 panjangnya 22
Luas persegi panjang= p x l
L= 22 x 11= 242