Vinay1983..vinay1983 wrote:Assuming the wall to be a rectangle, the total area is 11*20=220 sq.ft.
The larger wall paper costs $25 to cover 60 sq.ft, so it costs (220*25)/60 = approx $ 88 to cover the wall.
The smaller wall paper covers 10 sq. ft @ $6, so the area to be covered is 22 times, hence the cost will be 22*6 = $ 132.
So, I feel the least cost has to be approx $ 88.
What is the source and the OA?
Yep I realised it late enough.It necessarily has to be a combi of paper rolls, only then can we acheive the desired outcome.sanjoy18 wrote:Vinay1983..vinay1983 wrote:Assuming the wall to be a rectangle, the total area is 11*20=220 sq.ft.
The larger wall paper costs $25 to cover 60 sq.ft, so it costs (220*25)/60 = approx $ 88 to cover the wall.
The smaller wall paper covers 10 sq. ft @ $6, so the area to be covered is 22 times, hence the cost will be 22*6 = $ 132.
So, I feel the least cost has to be approx $ 88.
What is the source and the OA?
it is not $88..it actually cost $100. as when you covered 220 sqft wall using large roll..You are actually using 4 large roll.So cost will be 25*4=$100..But actual answer would be $99 ..see my post .
$25 for 60 square feet of wall, $6 for 10 square feet of wall.godhuli_golpo wrote:a wall with no windows 11 feet high and 20 feet long. a large roll of wallpaper costs $25 and will cover 60 square feet of wall. A small roll of wallpaper costs $6 and will cover 10 square feet of wall. What is the least cost for enough wallpaper to cover the wall?
