its doing my heasd in
S=2w · (l+h)+2lh
w = S/(2 · (l+h)+2lh)
.
1/2w=(l+h)+2lh / s.
2w=s/(l+h)+2lh
w=s/2((l+h)+2lh)
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Verified answer
S=2w · (l+h)+2lh
w = S/(2 · (l+h)+2lh)
.
1/2w=(l+h)+2lh / s.
2w=s/(l+h)+2lh
w=s/2((l+h)+2lh)