Q: 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?
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A: 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 The answer is  280.
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