find the surface area of thw cereal box

Question

i need help on surface area i need it now

Answer 1

Let's suppose that the box has length l, width w, and height h [note: you should fill in the actual numbers].

 

There are six rectangular sides of the box:

 - areas of top and bottom:         2*w*l

 - areas of front and back:          2*l*h

 - areas of two side panels:           2*w*h

 

The total surface area  =  2wl + 2lh + 2wh