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nguyenbmta
2 năm trước
Một hình hữ ngậy có chiều dài hoen chiều rộng 3m. Nếu giữ nguyên chièu rộng, tăng chiều dài gấp 4 lần thì được hình chữ nhật chu vi là 64cm. Tính diện tích hình chữ nhật ban đầu?
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