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A room is 24 feet long, 18 feet wide, and 9 feet high. How many square yards of wallpaper are needed to paper the four walls of the room?

Explanation

Area of front wall =\(9 \times 24=216 \mathrm{sq} . \mathrm{ft}\)
Area of back wall\(=9 \times 24=216 \mathrm{sq} . \mathrm{ft}\)
Area of side wall =\(9 \times 18=162 \mathrm{sq} . \mathrm{ft} .\)
Area of other side wall =\(9 \times 18=162 \mathrm{sq} . \mathrm{ft}\)
Total area of walls =\(216+216+162+162=756 \text { sqft. }\)
\(756 \div 9=84 \text { sq. yard }\)

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