Ответ:
18,84 = 6,28*R
R = 18,84/6,28= 3м
площа = 3,14*3*3= 28,26м^2
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Ответ:
18,84 = 6,28*R
R = 18,84/6,28= 3м
площа = 3,14*3*3= 28,26м^2