mot thua ruong hinh chu nhat co chieu dai a 2/25 km chieu rong bang 5/8 chieu dai.Hoi dien tick cua thua ruong do la bao nhieu m2?Tren thua ruong do nguoi ta trong lua khi thu hoach duoc tat ca 2 tan thoc.Hoi moi m2 ruong thu hoach dc bao nhieu kg thoc??