Answer:
57.1mm^2
Step-by-step explanation:
4*4=16
16/2=8mm^2 cross section
(4*3) + (4*3) + (5.7*3) = 41.1mm
8*2=16
41.1+16=57.1mm^2
125 would be the correct answer unless you needed to round then it would be 126
This could be a hexagonal prism but a little bit of tricky one. Though hexagonal prism has 8 regions, the 6 sides and the bottom and top but it does have 6 congruent rectangular regions.