Questions on Word Problems: Geometry answered by real tutors!

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Question 150180: Wallpaper comes in rolls of 6 metres long and 1 metre wide. How much wallpaper is needed to wallpaper walls in a bedroom if the bedroom is 4 metres by 5 metres by 2.5 metres? (Dont wallpaper the 1 metre by 2 metre door nor the 1 metre square window.) : Wallpaper comes in rolls of 6 metres long and 1 metre wide. How much wallpaper is needed to wallpaper walls in a bedroom if the bedroom is 4 metres by 5 metres by 2.5 metres? (Dont wallpaper the 1 metre by 2 metre door nor the 1 metre square window.)
Answer by jojo14344(321) About Me  (Show Source):
You can put this solution on YOUR website!
You need to loook on the area of the room right? What is that 2.5metres from your measurement?...thickness?- which you don't need
The Area of the bedroom is 4mx5m= 20m^2
And the wallpaper roll can only cover an Area of 6m^2 ----> 6mx 1m
So, you need 4
rolls to cover the room Area----> 4 x 6m^2 ---> 24m^2. This is enough because the room is only 20m^2
Thank you,
Jojo