Krish\textquotesingle s school day starts at $$8.30$$ am. Beforee break, he has three $$45$$-minute lessons, with a $$5$$ minute "moving period"~\uline{between}~lessons. Break starts as soon as lesson $$3$$ ends. At what time does break start?  Answer~\uline{~~~~~~~~~~}~ 
Overseas Competition->Knowledge Point->Combinatorics->Time Problem->Time Calculation