The length of the top of the table is 4 m greater than the width. The area is 77m^2.Find the dimensions of the table.

Solution:

                    l = w + 4

                    wl = 77

                    w^2 + 4w - 77 = 0

                    (w + 11)(w - 7) = 0

 Width = w = 7 m

 length = l = 11 m