Question 1170866
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    2L + 2W = 30   meters    (1)

    2L = 3W                  (2)


In equation (1),  replace 2L by 3W, based on (2).  You will get

    3W + 2W = 30

    5W      = 30

     W      = 30/5 = 6.


<U>ANSWER</U>.  The dimensions are  6 meters (the width) and 9 meters (the length).
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Solved.