Can you answer this Riddle?
A semi truck weighing exactly 10,000 pounds gets onto a bridge that is 100 miles long. The bridge's weight limit is exactly 10,000 pounds, any more will break the bridge. After going about 80 miles down the bridge a small bird lands on the truck. What happens?



Nothing.after travelling 80 miles the truck will have surely brunt enough fuel to allow the bird  to land on the truck without breaking the bridge.
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some amount of fuel will get empty
bird has some negligible weight
so nothing will happen
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