Answer:1. Case 1:Width = 15 cmLength = 12 m (convert to cm: 1200 cm)[ \text{Perimeter} = 2 \times (1200 + 15) = 2430 , \text{cm} ]2. Case 2:Width = 8 mLength = 18 m[ \text{Perimeter} = 2 \times (18 + 8) = 52 , \text{m} ]3. Case 3:Width = 18 m 20 cmLength = (unknown)