The length of a rectangle is 4 times its width. If the width of the rectangle is 5 inches, what is the rectangle's area, in square inches?
Choose the correct choice from the following:  A) 30 square inches  B) 75 square inches  C) 100 square inches  D) 89 square inches  E) 92 square inches

Rationale: "if the width is 5 in and the length is 4 times the width , then the length is 4 * 5 = 20 in the area is given by 5 * 20 = 100 square inches correct answer c"
Answer: C