Answer:
the answer is 23.431 feet.
Step-by-step explanation:
you divide the rectangle with the diagonals and you obtain a right angled triangle whose base is 18 feet and height 15 feet. The hypotenuse of the right angled triangle is the diagonal of the rectangle. SO using the pythagoras theorem you find the length of the hypotenuse.
[tex]\sqrt18^2 + 15^2\\=\sqrt 549\\=23.431[/tex]
