Question 98875
Lesson starts at 7:45 and ends at 15:45 - it takes 8 hours altogether, but we have to subtract lunch break - we get 7 hours and morning recess - 20 minutes, so we get 6 hours and 40 minutes - 6 hours that is 6*60 minutes, so we have 6*60+40 minutes = 360+40 = 400 minutes. If 8 lessons take 400 minutes, then 1 lesson takes 8* less (400/8), which is {{{50}}} {{{minutes}}}