Question 947145
2/3 of the entire practice time is spent scrimmaging, and 10 mins. is spent stretching.  
If 100 mins. is spent on stretching and scrimmaging,
that means that 100 - 10 = 90 mins. was spent scrimmaging.  So (2/3)t = 90 mins. where t= the total practice time.  
Therefore, t = 3*90/2 = 135 mins. = 2 hrs and 15 mins.