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dungtrantt2k
2 năm trước
Câu 1 : Cách đây 2 năm con lên 7 và kém cha 32 tuổi. Hỏi sau mấy năm nữa thì tuổi chs gấp 3 lần tuổi con ? Câu 2 : 1 cái sân hình chữ nhật có chu vi là 120m. Người ta tăng chiều dài lên 4m thì sân trở thành hình vuông. Diện tích ban đầu của cái sân là bao nhiêu ? Câu 3 : Một bể nước dạng hình hộp chữ nhật. Kích thước trong lòng bể như sau : chiều dài 2,5 m, chiều rộng 1,8 m và chiều cao 1,2 m. Hỏi bể đó chứ được nhiều nhất bao nhiêu thùng nước, nếu mỗi thùng có 60l nước ?
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