To contain oil spills, rectangular booms that have a cross-link to provide stability are used. The cross-link joins the long sides and is parallel to the short sides. What is the minimum total length of boom required to enclose an oil spill covering 100 000 m^2 of water if it can only be constructed from 10-m sections? I figured out how to do this if 10-m sections are not required, but cannot figure out what to do if the booms have restrictions. Please advise. Thanks!