Wallpaper sells for 250 per roll One roll covers an area 212

Wallpaper sells for $2.50 per roll. One roll covers an area 21/2 feet wide and nine feet long. How much would the wallpaper cost to cover 5 square yards of wall space? $5.00 $5.63 $6.75 $12.50

Solution

The area covered by one roll of wall paper is ( 2.5) * 9 = 22.5 sq. ft. Now, i yard = 3 ft. so that 5 square yards = 5 * 9 sq. ft. = 45 sq. ft. Thus, to cover 45 sq. ft pf space on the wall, the requirement of wall paper is 45/22.5 = 2 rolls. Since 1 roll costs $ 2,5, 2 rolls will cost $ 2 * 2.5 = $ 5 The correct answer is (a).