The length of a rectangular field is 7/5 its width. If the perimeter of the field is 360 meters, what is the width of the field? Pick:
A) 50 B) 60 C) 70 D) 80 E) 75

Rationale: "let l be the length and w be the width . l = ( 7 / 5 ) w perimeter : 2 l + 2 w = 360 , 2 ( 7 / 5 ) w + 2 w = 360 solve the above equation to find : w = 75 m and l = 105 m . correct answer e ) 75"
Answer: E