Problem: what is the area of a rectangle whose length is twice its width and whose perimeter is equal to that of a square whose area is 1 ? 
Options: ['a ) 1 / 9 sq units .', 'b ) 4 / 9 sq units .', 'c ) 8 / 9 sq units .', 'd ) 7 / 9 sq units .', 'e ) 6 / 9 sq units .']
c