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Answer:
length=l=5ft+width(w)
l=5+w......1
perimeter=61 ft
2(l+w)=61
5+w+w=61/2
2w=61/2 -5
w=(61-10)/4=51/10=5.1ftanswer
substituting value of w in equation 1
l=5+5.1=10.1ft answer