The area of a window measures three 36 in.² if the window is 16 inches wide how long is the window

Let
length of the window=x 
 width of the window=16
area of the window= length x width
                     36 = x (16)
                     36 = 16x
                     x   = 36/16
                     x   = 2.25
            length = 2.25
   hope the answer is helpful 

It's lithogenous i believe of course i looked it up.