Question 1158678
The room is a cube that measures
8 x 9 x 11
There are 2 facing wall measuring 8 x 11
There are 2 facing walls measuring 8 x 9
Let {{{ A }}} = the combined area of the 4 walls
{{{ A = 2*8*11 + 2*8*9 }}}
{{{ A = 2*8*( 11 + 9 ) }}}
{{{ A = 16*20 }}}
{{{ A = 320 }}} ft2