The bag full of sand would weigh 250 * .8 = <<250*.8=200>>200 pounds

The filling material would make it 200 * .4 = <<200*.4=80>>80 pounds heavier

So it weighs 200 + 80 = <<200+80=280>>280 pounds

# Answer

280
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Tom fills a 250 pound sandbag 80% full.  But the filling material he is using is 40% heavier than sand.  How much does the bag weigh?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
280
Tom fills a 250 pound sandbag 80% full.  But the filling material he is using is 40% heavier than sand.  How much does the bag weigh?
train