Answer :
area required to tile is 8mx10m=80 m^2
the wall area to paint is 2(8mx9m +10mx9m)=2(72+90)=2(162)=324m^2 - any doors and widows
the wall area to paint is 2(8mx9m +10mx9m)=2(72+90)=2(162)=324m^2 - any doors and widows