The coloring takes 2*.3=<<2*.3=.6>>.6 hours less than the drawing

So it takes 2-.6=<<2-.6=1.4>>1.4 hours per picture

So it takes him 2+1.4=<<2+1.4=3.4>>3.4 hours per picture

That means it takes 3.4*10=<<3.4*10=34>>34 hours

# Answer

34
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
John decides to take up illustration.  He draws and colors 10 pictures.  It takes him 2 hours to draw each picture and 30% less time to color each picture.  How long does he spend on all the pictures?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
34
John decides to take up illustration.  He draws and colors 10 pictures.  It takes him 2 hours to draw each picture and 30% less time to color each picture.  How long does he spend on all the pictures?
train