P=44.6
P=a+b+√a^2+b^2=11+15+√11^2+15^2≈44.6
They increased it by $10.
It ended up costing $60.
Hope this helps.
Well, you can't have 4/3 of a rope because 3/3 would be one whole. That is an improper fraction. It would be 1 and 1/3. If you divide that in to two, then you get 2/3. Is that the answer you were looking for?