Question 914341
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Hi,
     *[illustration rectangle.png].
A = Lw = 75m^2
L = 75/w
L + w = 20m
{{{(75/w) + w = 20}}}
75 + w^2 = 20w
w^2 - 20w + 75 = 0
(w-15)(w-5) = 0
w = 15  0r w = 5
Dimensions are 5m by 15m