How Do You Calculate the Area of a Rectangular Glass Rod?

[uno]

1. I can't seem to find a formula to figure out the area of an upright rectangular glass rod. Can someone point me in the right direction?



2.

The Attempt at a Solution

 

[turin]

Just add the areas of the rectangular surfaces. I'm assuming you mean surface area.

 

[uno]

ok, they gave me 10 cm by 10 cm by 10 meters, but I'm not sure what step to take next