You have new carpeting installed in a rectangular room. You are charged for 28 square yards of carpet and 60 feet(20yards) of tack strip.Tack strip is used along the perimeter to secure the carpet in place. Do you think these figures are correct?

Suppose the rectangular carpet were 4x7 yards in dimension, giving 4x7=28 square yards of carpet. The perimeter of the carpet would then be 4+4+7+7=18 yards.

This would be less than the 20 yards of tack strip, so the figures appear correct.