volume of cuboid: 14*28*17
volume of cuboid: 6664cm^3
radius=7
area of semi circle=pi*r^2/2
area of semi circle=pi*7^2/2
area of semi circle=76.96902001cm^2
are of cross section*length
76.96902001cm^2*28=2155.13256cm^3
2155.13256cm^3+6664cm^3=8819.13256cm^3