Cho một hình trụ, một hình nón và một hình cầu, trong đó hình trụ và hình nón và bán kính có đường kính đáy và chiều cao bằng đường kính của hình cầu. Biết thể tích hình nón là 20 cm ³. Tính thể tích của hình trụ và hình cầu

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