Calculate the largest rectangular area one can enclose with 14 inches of string?

The correct answer to this question is 12.25 sq inches.

The largest rectangle is a square.

So if you divide 14" by 4 then you get 4 3.5" sides.

Area of a rectangle = L*W

Area of a rectangle = 3.5 * 3.5

Area of a rectagle = 12.25 sq inches