Cho tấm bìa hình vuông cạnh 50 cm. Để làm một mô h...
Câu hỏi: Cho tấm bìa hình vuông cạnh 50 cm. Để làm một mô hình kim tự tháp Ai Cập, người ta cắt bỏ 4 tam giác cân bằng nhau có cạnh đáy chính là cạnh của hình vuông rồi gấp lên, ghép lại thành môt hình chóp tứ giác đều. Để mô hình có thể tích lớn nhất thì cạnh đáy của mô hình bằng:![](data:image/png;base64,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)
A \(20\sqrt{2}cm\)
B \(15\sqrt{2}cm\)
C \(10\sqrt{2}cm\)
D \(25\sqrt{2}cm\)
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG môn Toán trường THPT Chuyên Trần Phú - Hải Phòng - lần 1 - năm 2018 (có lời giải chi tiết)