Question 1123328
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L + W + L + W = 228   feet   (the perimeter)

2L + 2W = 228


L + W = 228/2 = 114.


Substitute W = L - 42.


L + (L - 42) = 114 


2L = 114 + 42 = 156


L = 156/2 = 78.


<U>Answer</U>.  The dimensions are  78 ft (length)  and  78 - 42 = 36 ft (width).
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Solved.