In this question the main information's are already provided. Based on them the answer to the question can be easily deduced. Let us assume the width of the poster = x Then the length of the rectangle = 3x The perimeter of the rectangle = 24 inches we already know Perimeter = 2 ( Length + width) 24 = 2( 3x + x) 24 = 2 * 4x 24 = 8x x = 24/8 = 3 So the width of the rectangle is 3 inches Length of the rectangle = 3x = 3 * 3 = 9 So the length of the rectangle is 9 inches.
