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Keliling persegi panjang : ↓
22 => 2 × (panjang + lebar)
P + L => 22 ÷ 2
p + l => 11
Luas persegi panjang : ↓
70 => (p + 3)(l + 3)
70 => pl + 3L + 3P + 9
61 => pl + 3 × (Lebar + Panjang)
61 => pl + 33
pl => 28 cm²
Semoga membantu ya.