Предмет: Математика, автор: Аноним

площадь осевого сечения цилиндра равна 81см² площадь основания- 144π см². найдите обьем цилиндра. спасибо))

Ответы

Автор ответа: irinan2014
0
Всё решаем по формулам.......
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Автор ответа: Аноним
0
спасибо))))
Автор ответа: ewgenijbark
0
S=144π=π*r²⇒ r²=144⇒ r = 12
Sсеч=2*r*h=81
2*12*h=81
h=3.375
V=π*r²*h=π*144*3.375=486 π см³
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