Question 454827
The Golden ratio is the ratio length/width of a rectangular, in our case:

{{{L/W=1.618}}}. Let's = X the length of the cardboard,  since the width of the 

cardboard is W=0.875, we write:{{{1.618=X/0.875}}}=>{{{X=1.618*0.875}}}

{{{X=1.416}}} ft.

Answer:The length of the cardboard is 1.416 ft.