John wants to finish a show in 5 days.  There are 20 episodes and they are each 30 minutes long.  How many hours does he have to watch a day?
He wants to watch 20*30=<<20*30=600>>600 minutes
So he needs to watch 600/60=<<600/60=10>>10 hours
That means he needs to watch 10/5=<<10/5=2>>2 hours a day
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