The length of a rectangle is 3 times its width. If the width of the rectangle is 5 inches, what is the rectangle's area, in square inches? Select.
A) 30 square inches
B) 75 square inches
C) 68 square inches
D) 89 square inches
E) 92 square inches

Rationale: "if the width is 5 in and the length is 3 times the width , then the length is 3 * 5 = 15 in the area is given by 5 * 15 = 75 square inches correct answer b"
Answer: B