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1. kelilingnya = 2.000m
2. panjangnya = 500m
dit = lebarnya
jawab =
keliling persegi panjang = 2 (panjang + lebar)
2.000m = 2(500m + l)
2.000m = 1.000m + 2l
2.000m-1.000m = 2l
1000m=2l
l=500m
maaf kalau salah....