the height of a wall is 25 feet and an 8 x 20 rectangular door is positioned on the wall such as there is 8 feet of wall remaining on the right side and 4 feet remaining on the left side. Find the area of the wall to be painted. do not paint the door

Find the areas of both the wall and the door and subtract the two

8 x 20 = 160
to find the width of the wall:
4+ 8+ 8= 20
Area of the wall:
25 x 20 = 500
Area to be painted:
500-160 = 340 ft^2