If the area of a square with sides of length 6 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 answer:
A) 4
B) 8
C) 12
D) 9
E) 18

Rationale: "let length of rectangle = l 6 ^ 2 = l * 4 = > l = 36 / 4 = 9 answer d"
Answer: D