Задача 1.

                               

   

                                                                                  В практических приложениях часто  указывается диаметр (D) шара.

                                                                               Какую формулу объёма шара целесообразно использовать в подобной  

                                                                               ситуации?  

                                                                                                                                           

                                                                                                    Решение.

 

                           

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