Question 347976
Hi
*Note: Area of a rectangle is l*w
Let l represent the length. Question states w = 2*l 
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{{{l*(2*l) = 162*m^2}}}
{{{2*l^2 = 162*m^2}}}
{{{l^2 = 81*m^2}}}
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{{{l=root(2,81)}}} = +-9 (Not able to use the -9 for length)
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l = 9m
w = 18m  (w=2*l)
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check your answer
{{{9m*18m = 162m^2}}}