I'm assuming that your figure is a rectangular prism. Here are the calculations to find the surface area:
5*7*2=70
5*6*2=60
7*6*2=84
70+60+84=214 un2
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The total surface area! The total surface area! The total surface area! The total surface area!
It should be relatively easy to find the surface area of a box when you are given the surface area.
It depends on the surface area of what!
surface area
It is the area of the exposed surface. So if you take a cube, the surface area is the sum of the areas of each of the 6 faces. They are all the same in the case of a cube. In general, add up the surface area of each exposed surface and this is the total surface area.