SOLUTION: the width of a rectangular swimming pool is 12 meters less than the length and the perimeter is 72 meters find its dimensions

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W + L + W + L = 72   perimeter


(L-12) + L + (L-12) + L = 72


4L - 24 = 72


4L = 72 + 24 = 96  ====>  L =  = 24.


The dimensions are 24 and 12 meters.