Cho hình thang ABCD có \(A = B = 90^\circ...
Câu hỏi: Cho hình thang ABCD có \(A = B = 90^\circ ,AD = 2AB = 2BC = 2\). Tính thể tích khối tròn xoay sinh ra khi quay hình thang ABCD xung quanh trục CD.![](data:image/png;base64,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)
A. \(\frac{{7\sqrt 2 \pi {a^3}}}{6}\)
B. \(\frac{{7\pi {a^3}}}{{12}}\)
C. \(\frac{{7\sqrt 2 \pi {a^3}}}{{12}}\)
D. \(\frac{{7\pi {a^3}}}{6}\)
Câu hỏi trên thuộc đề trắc nghiệm
Đề thi thử THPT QG môn Toán năm 2019 cụm 8 Trường Chuyên ĐB Sông Hồng