Polly plans to cover two walls of her rectangular room with wallpaper, as shown below.
A rectangular prism is shown with two walls with a pattern on them. The length of the wall is shown as 5 m and the height as 5 m.
A roll of wallpaper is 10 meters long and 0.5 meters wide. Assuming that there is no wastage, how many rolls of wallpaper would Polly require to cover the two walls?
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See that total area of the wall needed to cover = 5*5 +5*5 = 25+25 = 50
And the area of a single roll of wallpaper = 10 * 0.5 = 5
So, no. required = [ use your common sense]... tell me if you can't figure out..