Question

num cilindro reto de 20 m de altura o raio da base mede 4 m .calcule a area total e o volume do cilindro​

Answer 1

$\Large\boxed{\begin{array}{l}\sf A_t=2\pi r(r+h)\\\sf A_t=2\pi\cdot 4(4+20)\\\sf A_t=2\pi\cdot 4\cdot24\\\sf A_t=192\pi~m^2\\\sf V=\pi r^2\cdot h\\\sf V=\pi\cdot4^2\cdot 20\\\sf V=\pi\cdot16\cdot20\\\sf V=320\pi~m^3\end{array}}$