Given data:
The first side of the triangle is a=3 ft.
The second side of the triangle is b=54 ft.
For a triangle the sum of any two sides mus be greater than third side.
(3 ft+54 ft)>c
c<57 ft.
and
(3 ft+c)>54 ft
c>51 ft
Thus, the side of the triangle lie between 51