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Bài 2: Một mảnh vườn hình chữ nhật có chu vi 240m và gấp 5 lần chiều rộng. Người ta trồng rau trên mảnh vườn đó, cứ 100m2thì thu được 1,8 tạ rau. Hỏi trên cả mảnh vườn đó người ta thu hoạch được bao nhiêu ki – lô – gam rau?
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