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Question

anonymous · Answer

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anonymous · Answer

The two interior faces of the cubes give 49 each, but you also need the area of the slanted piece joining the cubes, which is a rectangle with area = length x width.

anonymous · Answer

so would it be 98 sq m? @douglaswinslowcooper

anonymous · Answer

98 sq m is the area of the cube faces.
What about that slanted piece? What is its height? (7) 
and
what is its length?  (make a right triangle and calculate hypotenuse.)

anonymous · Answer

So it's 147 all together? @douglaswinslowcooper

anonymous · Answer

I have not done it, but if you got the slanted piece correct and added it to the 98 you have the right answer. I think the slanted piece is 
49 sqrt(2), but check it out.

anonymous · Answer

I do not see my answer there, so they must just mean the two 49 sq m pieces. Sorry to have led you astray. Apparently the slanted piece is not considered to have an inner area?