<PRE><B>Question 579251</B>
The facing walls will have the same area.
This is always true if the room has a rectangular
floor plan.
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The area of a wall is found by ( height of wall ) x ( length of wall )
One pair of facing walls measure:
{{{ 8*10 = 80 }}} ft2
So, the area of these 2 walls is {{{ 2*80 = 160 }}} ft2
The other pair of facing walls mwasure:
{{{ 8*15 = 120 }}} ft2
So, the area of these 2 walls is {{{ 2*120 = 240 }}} ft2
Adding up the 4 walls:
{{{ 160 + 240 = 400 }}} ft2
400 square feet of the den will be covered with wallpaper</PRE>