Hi! This is a Maths C problem I have been struggling with for quite some time. I have already spent several hours on this problems and sought assistance. I have got my answer to equal 32mins. However, my teacher has claimed that the answer to this problem is approx 34 minutes. Any help or guidance as to where I have gone wrong would be greatly appreciated. Note : Force of friction remains constant. First image is the question, the following two are my working.