Question 1151066
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The dimensions are x and 4x inches.


The equation for the area to find x is THIS


    4x*x = 100  square inches

    4x^2 = 100

     x^2 = 100/4 = 25

     x           = {{{sqrt(25)}}} = 5 inches.


<U>ANSWER</U>.  The width is 5 inches.  The length is 4*5 = 20 inches.
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Solved.