Q:

A designer enlarged both the length and the width of a rectangular carpet by 60 percent. The new carpet was too large so the designer was asked to reduce its length and its width by 25 percent. By what percent was the area of the final item greater than the area of the original? (A) 20% (B) 35% (C) 44% (D) 82% (E) 85%

Accepted Solution

A:
Answer:300% Step-by-step explanation:Let the length of the carpet be L.Let the width of the carpet be W.The original area of the carpet is:A = L * W = LWThe length and width are enlarged by 60%. The new length is:L + (L * 60/100) = L + 0.6L = 1.6LThe new width is: W + (W * 60/100) = W + 0.6W = 1.6WThe length and width are then reduced by 25%.The new length is:1.6L + (1.6L * 25/100) = 1.6L + 0.4L = 2LThe new width is:1.6W + (1.6W * 25/100) = 1.6W + 0.4W = 2WThe new area will be:A = 2L * 2W = 4LWTo find the percentage increase in the area, we subtract the original area from the new area and divide by the original area:4LW - LW = 3LW% increase is:[tex]\frac{3LW}{LW} * 100[/tex] = 300%The area of the final item is 300% greater than the original item.