The length of a rectangle is 3 times its width. If the width of the rectangle is 4 inches, what is the rectangle's area, in square inches? Pick one: A) 30 square inches B) 75 square inches C) 68 square inches D) 48 square inches E) 92 square inches

Rationale: "if the width is 4 in and the length is 3 times the width , then the length is 3 * 4 = 12 in the area is given by 4 * 12 = 48 square inches correct answer d"
Answer: D