Answer:
28.3 ft
Step-by-step explanation:
Picture out the scenario, the town square is just a square, and a walkway cut diagonally through the square, we can solve it using Pythagora's theorem:
[tex]a^2+b^2=c^2[/tex]
Where a and b are the two shorter legs, and c is the hypotenuse (the longest leg in a right triangle).
Replace the values in:
[tex]20^2+20^2=c^2\\400+400=c^2\\800=c^2\\c=28.28427124...[/tex]
Round to the nearest tenth of a foot to get:
[tex]c=28.3[/tex]
