Answers

2015-06-05T13:11:39+05:30
I METHOD
place the mixture on a magnet and then pass a breeze over it it will flow of the saw dust and salt and iron will remain on it.
II METHOD 
place the mixture in a table salt container and SHAKE it all the salt will pass out the container
III METHOD 
mix the mixture with water . the iron nail with the salt will sink and then take off the saw dust it will float.
HOPE IT             HELP U 

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2015-06-06T10:37:59+05:30
To separate iron filings ,we can use a magnet . Then we would take water and put saw dust , table salt and stir the mixture . Salt will be dissplved but saw dust will fload and separate it by hand . The evaporate water and salt will be left . Everything is separated !!
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