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Answer :

In this problem we can calculate all the posibilities to find the surface of the figure so:

[tex]S_A=4\cdot5\cdot2+5\cdot7\cdot2+4\cdot7\cdot2_{}[/tex]

and we solve so:

[tex]\begin{gathered} S_A=20+70+56 \\ S_A=166 \end{gathered}[/tex]

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