ANSWER:
length=37
width=19
HOW TO DO IT:
perimeter = 2(l+w)
110=2(l+w)
l=2w+1
now plug that into the equation (substitution)
110=2((2w+1)+w)
110=2(3w+1)
110=6w+2
now solve for w
108=6w
w=18
now plug w into the equation again to solve for l
110=2(l+18)
110=2l+36
74=2l
l=37