Question 1134777
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1.  Five tiles have 5*4 = 20 edges.



2.  We are given that the perimeter of the spot is 10 feet.

    It means that there are 10 edges opened to outside.


    It means, in turn, that 10 other edges are adjacent one to the other,

    so  10/2 = 5 edges are commonly (in-pairs) adjacent.



3.  These hints  helped / facilitated  me to find the spot configuration.


    Here it is :    X X
                    X X X


    Calculate the outer perimeter. There are 10 edges opened to outside,

    so this configuration (<U>and every other equivalent to it</U>) satisfies the condition.
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Solved.