If the area of a square with sides of length 8 centimeters is equal to the area of a rectangle with a width of 4 centimeters, what is the length of the rectangle, in centimeters?
Choose the correct choice from the following answers:
A) 4 B) 8 C) 12 D) 16 E) 18

Rationale: "let length of rectangle = l 8 ^ 2 = l * 4 = > l = 64 / 4 = 16 answer d"
Answer: D