Math 12A
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A rectangular building is to be built on a lot measuring 46m by 30m. The building will be surrounded by a strip of lawn of uniform width. If the lawn takes up 30% of the lot, how wide will the lawn be?

Math 12A 
Damon
length = 46 + 2w
width = 30+2w
building area = (462w)(302w)
0.7 * lot area = building area
0.7*46*30 = (462w)(302w)
multiply it out and solve quadratic
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