so as before
surface area=area of all the sides=
area of base
area of 2 triangles
area of 2 rectangles
area of base=legnth times width=16 times 9=144
area of 2 triangles=2 times area of triangles=2 times 1/2 times base times height=2 times 1/2 times 16 times 6=1 times 16 times 6=96
area of 2 rectangles=2 times area of rectangle=2 times legnth times width=2 times 10 times 9=180
total surface area=base+2 triangles+2 rectangles
total surface area=144+96+180=420
the answer is 420 square inches
the answer is B