Trên bàn có một cốc nước hình trụ chứa đầy nước, c...
Câu hỏi: Trên bàn có một cốc nước hình trụ chứa đầy nước, có chiều cao bằng 3 lần đường kính của đáy. Một viên bi và một khối nón đều bằng thủy tinh. Biết viên bi là một khối cầu có đường kính bằng đường kính của cốc nước. Người ta từ từ thả vào cốc nước viên bi và khối nón đó (hình vẽ) thì thấy nước trong cốc tràn ra ngoài. Tính tỉ số thể tích của lượng nước còn lại trong cốc và lượng nước ban đầu (bỏ qua bề dày của lớp vỏ thủy tinh).![](data:image/png;base64,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)
A \(\frac{5}{9}\)
B \(\frac{2}{3}\)
C \(\frac{1}{2}\)
D \(\frac{4}{9}\)
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG môn Toán THPT Kim Liên - Hà Nội - lần 1 - năm 2018 (có lời giải chi tiết)