Question 415139
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Hi

The width of a rectangle is two thirds of its length
Let x and 2/3x represent the length and width
Question states***
 x(2/3x)= 216m^2       |CHECKING our Answer***18m*12m = 216m^2
Solving for x
  2/3x^2 = 216
     x^2 = 324    x = 18m  (tossing out negative solution for length)