The Millers have hired an interior designer to decorate their family room. They want to have a 20" by 20" oil painting framed and incorporated in the design plan. If the designer chooses molding that is 4" wide and is priced at $2.10 per inch, how much will the molding cost (before tax)?

2 answers

well, the perimeter of the painting is 20x20 inches
But the molding is 4" wide, so the outside length of the molding is 28x28.
So the cost is 4*28 inches * $2.10/inch = $___________
L = 4 + 20 + 4 = 28 in.
W = 4 + 20 + 4 = 28 in.

P = 2L + 2W = 2*28 + 2*28 = 112 1n.

Cost = 112in * 2.10/in. =