Answer:
Area of a rectangle is Width * Length
Apply this to each area the question asks for
AreaTop = 8cm * 4cm = 32[tex]cm^{2}[/tex]
AreaBottom = the same, 32[tex]cm^{2}[/tex]
AreaFront = 2cm * 4cm = 8[tex]cm^{2}[/tex]
AreaBack = the same, 8[tex]cm^{2}[/tex]
AreaLeftSide = 2cm * 8cm = 16[tex]cm^{2}[/tex]
AreaRightSide = the same, 16[tex]cm^{2}[/tex]
TotalSurfaceArea = 16 + 16 + 8 + 8 + 32 + 32 = 112[tex]cm^{2}[/tex]
