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nguyenkhiemhung
2 năm trước
Một mảnh vườn hình chữ nhật có chu vi 160m, chiều rộng 30m. Người ta trồng rau trên mảnh vườn đó, trung bình cứ 10m vuông thu được15kg rau. Hỏi trên cả mảnh vườn đó người ta thu hoạch được bao nhiêu ki-lô-gam rau ?
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