(x2y3)1/2(x2y3)1/3=xa/3ya/2 where a is constant, is true for all positive values of c and y, what is value of a?

Jack has a rectangular piece of land, the area of which is represented by a1 = 9.5l. his brother has a different rectangular piece of land, the area of which is represented by a2 = l(14 − l). let a represent the area in square meters and l represent the length in meters of the pieces of land. the two equations plotted on a graph meet at a point as shown in the image