Respuesta :

[tex]\bf \textit{area of a circular ring}\\\\ A=\pi (R^2-r^2)\qquad \begin{cases} R=\textit{larger radius}\\ r=\textit{smaller radius}\\ --------\\ R=12\\ r=9 \end{cases}\implies A=\pi (144-81)[/tex]

volume of the hollow cylinder, the product of the area of the ring and the height of the cylinder

Otras preguntas