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Câu 14:

Cho hình nón có bán kính đáy $r=a$

Câu 14: Cho hình nón có bán kính đáy r=ar=ar=a, chiều cao là h=3ah=3ah=3a, thể tích của khối nón bằng

Thông tin câu hỏi

Câu 14:

Cho hình nón có bán kính đáy $r=a$ , chiều cao là $h=3a$ , thể tích của khối nón bằng