Question

Please help. (question is on the image)

Answer 1

2(breadth * length )+2(breadth *height )+2(length*height)

Answer 2

notice the picture
the rectangular prims, is really just 6 rectangles, stacked up to each other at the edges

now, notice your picture
tis the same

thus, find the area of each of those 6 rectangles, and ADD THEM UP
that'd be the area of the figure, or prism

Answer 3

opposite sides has area equal

so you can writing

2*10*7 + 2*10*12+2*12*7 = ?