Respuesta :
[tex]this \: is \: the \: for \: silinder = \pi \: {r}^{2} h \\ r = 8 \div 2 \\ \: \: \: \: \: = 4 \\ ( \frac{22}{7} \times {4}^{2} \times 20) \\ = 1005 \frac{5}{7} \\ \frac{60}{100} \times 1005 \frac{5}{7} \\ = 603 \frac{3}{7} [/tex]