You are given the perimeter of the desk which is 54 inches. Also, you are given the length of the disk with a value of 15 inches. You are required to solve for its width. The top of a desk is assumed to be rectangular since the problem asks for its width. The equation of the perimeter of a rectangle is P=2L+2W. Let us designate the values for P=54 inches and L=15 inches. Plugging in the values to the equation;
P=2L+2W
54 inches = 2(15 inches) + 2W
54 = 30+2W
54-30 = 2W
2W = 24
W=24/2
W= 12 inches
Therefore, the width of the top desk is 12 inches.
