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
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
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