Question

Seja um cilindro de 20cm de altura e raio de base 5cm qual a medida da area total desse corpo

Answer 1

$\large\boxed{\begin{array}{l}\sf A_t=2\pi r^2+2\pi r h\\\sf A_t=2\pi r( r+h)\\\sf A_t=2\cdot\pi\cdot5(5+20)\\\sf A_t=10\pi\cdot25\\\sf A_t=250\pi~cm^2\end{array}}$