Answer:
144
Step-by-step explanation:
The combined area of the two triangular faces is [tex](4)(3)=12[/tex] cm².
The area of the back rectangular face is [tex](3)(11)=33[/tex] cm².
The area of the bottom rectangular face is [tex](11)(4)=44[/tex] cm².
The area of the slanted rectangular face is [tex](5)(11)=55[/tex] cm².
Taking the sum of these areas, the total surface area is [tex]12+33+44+55=144[/tex] cm².
