Question 682550
p = 10 = 2l + 2w
w = l - 3
...
10 = 2l + 2(l-3)
10 = 2l + 2l - 6
10 = 4l - 6
16 = 4l
{{{highlight_green(l=4)}}}ft
w = 4 - 3 = {{{highlight_green(w=1)}}}ft
Therefore a = l*w = 4*1 = {{{highlight_green(a=4ft^2)}}}
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