PUNE MCA Exam 2015 Question Paper with answers for online practice

A chess match starts between 6 pm-7 pm and ends between 9 pm – 10 pm, observing in 12 hours wall clock, when the match starts the minute hand points at position ‘m’ and hour hand points at position ‘h’. When the match ends, the hour hand points at ‘m’ and minute h and at ‘h’, then what is the minimum time the game is played ?