Resoluçao:

Cilindro                                                            Paralelepípedo

Ac = 2πr(h+r)                                                  Af = 24 x 2 = 48

Ac = 2.3.2(10+2)                                             Al = 20 x 2 = 40

Ac = 144 cm²  => 0,0144 m²                           Ab = 30 x 2 = 60

0,0144 x 25 = 0,32                                          total = 148 cm²

Resposta: 0,36