James does chores around the class.  There are 3 bedrooms, 1 living room, and 2 bathrooms to clean.  The bedrooms each take 20 minutes to clean.  The living room takes as long as the 3 bedrooms combined.  The bathroom takes twice as long as the living room.  He also cleans the outside which takes twice as long as cleaning the house.  He splits the chores with his 2 siblings who are just as fast as him.  How long, in hours, does he work?
It takes 3*20=<<3*20=60>>60 minutes to clean the living room
So it is 60/60=<<60/60=1>>1 hour
The bathroom takes 1*2=<<1*2=2>>2 hours
So all together the inside takes 1+1+2=<<1+1+2=4>>4 hours
The outside takes 4*2=<<4*2=8>>8 hours
So the chores take 4+8=<<4+8=12>>12 hours
He splits it 1+2=<<1+2=3>>3 ways
So he works 12/3=<<12/3=4>>4 hours
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