4. The top of the John Hancock Building is a rectangle whose length is 60 ft more than the width. The perimeter is 520 feet. Find the width and the length of the rectangle.
A.w= 100 ft, L = 40 ft
B.w=160 ft, L = 100 ft
C.W = 40 ft, L = 100 ft
D.W = 100 ft, L = 160 ft