SOLUTION: find the area of a door with a of 12dm and a length that is 9dm more than its width

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Question 684149: find the area of a door with a of 12dm and a length that is 9dm more than its width
Answer by ReadingBoosters(3246) About Me  (Show Source):
You can put this solution on YOUR website!
w = 12
l = w + 9
...
l = 12 + 9 = 21
...
a = l*w
a = 12 * 21 = 372 dm^2
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