Resposta :
Area base = pi.r^2
= 3,14(2^2)
Area base = 12,56 cm^2
Area lateral = 2.pi.r.altura
= 2.(3,14).4
Area lateral = 25,12 cm^2
Area total = Area lateral + 2.Area base
= 25,12 + 2.(12,56)
Area total = 50,24 cm^3
Volume = Area base x altura
= 12,56(4)
Volume = 50,24 cm^3