His speed means he can do 10/100=<<10/100=.1>>.1 minute per piece

So he can finish 1 puzzle in 2000*.1=<<2000*.1=200>>200 minutes

So these two puzzles take 200*2=<<200*2=400>>400 minutes

# Answer

400
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
James buys 2 puzzles that are 2000 pieces each.  He anticipates for these larger puzzles he can do 100 pieces every 10 minutes.  So how long would it take to finish both puzzles?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
400
James buys 2 puzzles that are 2000 pieces each.  He anticipates for these larger puzzles he can do 100 pieces every 10 minutes.  So how long would it take to finish both puzzles?
train