new length = 100 + 2 x
new width = 50 + 2 x
new area =(2x+100)(2x+50)
so
(2x+100)(2x+50) - 50*100 = 459
solve quadratic :)
A rectangular grassy area in a park measures 50 yards by 100 yards. The city wishes to put a uniform sidewalk around the grassy area which would increase the area by 459 yd^2. What is the width of the sidewalk?
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What do you mean by solve quadratic?
2 answers