The length of a rectangular field is 7/5 its width. If the perimeter of the field is 432 meters, what is the width of the field?  Pick one
A) 50  B) 60  C) 70  D) 80  E) 90

Rationale: "let l be the length and w be the width . l = ( 7 / 5 ) w perimeter : 2 l + 2 w = 432 , 2 ( 7 / 5 ) w + 2 w = 432 solve the above equation to find : w = 90 m and l = 126 m . correct answer e ) 90"
Answer: E