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Verified answer
Panjang sebenarnya = 3,5 mm × 1000= 3500 mm
lebar sebenarnya = 1,5 × 1000
= 1500 mm
Keliling = 2 × (p + l)
= 2 × (3500 + 1500)
= 2 × 5000
= 10000 mm
= 10 meter