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pehang2520
2 năm trước
Làm ơn giúp mình với! :’( 1 thùng nước có chiều dài bằng 4dm chiều rộng bằng 2dm chiều cao bằng 7dm, bỏ nước vào thùng cao 4dm. sau đó người ta bỏ 25 viên gạch Có chiều dài bằng 2dm chiều rộng bằng 1dm chiều cao bằng 0.5dm.Hỏi chiều cao mực nước còn bao nhiêu dm thì cao bằng miệng thùng?
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