Question 1124061
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Let W be the width.


Then length is  L = 2W, according to the condition.


The area equation is 


L*W = (2W)*W = 115200,   or


2W^2 = 115200,   or

W^2 = 57600.


It implies  W = {{{sqrt(57600)}}} = 240.


<U>Answer</U>.  The width is  240 ft.
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Solved.