Respuesta :

wingwingcn89

Answer:

648.8 mm^2

Step-by-step explanation:

total surface area

=surface area of sphere + curve surface of cylinder

=4πr^2+2πrh

=4(3.14)(8.4/2)^2+2(3.14)(8.4/2)(16.2)

=648.8 mm^2 (nearest tenth)