Отрезок MN разделен точками К и Т в отношении 1:2:3, причем самая маленькая из частей отрезка на 5 дм меньше самой большой. Чему равна длина всего отрезка?

My favourite author it Esenin Sergey Alexander. Gave birth of Octobers (on September, 21), 3, 1895, in rural Konstantinovo to the province of Ryazanskoy in well-to-do peasant monogynopaedium. He has zbornik stikhov:pismo to the woman.  Sergey Esenin with a difference made off in 1909 from Konstantinovskoe zemskoe school, since church-teaching school, but, taught a good lesson there are one and a half years, went away from it - the profession of teacher attracted him little.  It is my favourite writer