Một chiếc cốc hình trụ có đường kính đáy \(6\,\) c...
Câu hỏi: Một chiếc cốc hình trụ có đường kính đáy \(6\,\) cm, chiều cao \(15\,\) cm chứa đầy nước. Nghiêng cốc cho nước chảy từ từ ra ngoài đến khi mép nước ngang với đường kính của đáy cốc. Khi đó diện tích của bề mặt nước trong cốc bằng ![](data:image/png;base64,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)
A \(9\sqrt{26}\pi \,\,c{{m}^{2}}.\)
B \(\frac{9\sqrt{26}\pi }{2}\,\,c{{m}^{2}}.\)
C \(\frac{9\sqrt{26}}{5}\pi \,\,c{{m}^{2}}.\)
D \(\frac{9\sqrt{26}}{10}\pi \,\,c{{m}^{2}}.\)
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG môn Toán THPT Chuyên Đại học Vinh - Lần 3 -năm 2018 (có lời giải chi tiết)