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Density of substance

  1. Apr 13, 2015 #1
    1. The problem statement, all variables and given/known data
    question.png

    2. Relevant equations
    Density = mass / volume

    3. The attempt at a solution
    the correct ans given is B.
    Mass is constant. I calculated the volumes of each (the cube of the separation), found the difference in density and then divide the difference by the initial density. but the answer i obtained was 0.31, which is not even given here.
    i verified my answer many times but there don't seem to be an error
     
  2. jcsd
  3. Apr 13, 2015 #2

    ehild

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    Homework Helper
    Gold Member

    You need the factor between the final density and the initial density,
     
  4. Apr 13, 2015 #3

    andrevdh

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    Please show how you got to 0.31
     
  5. Apr 13, 2015 #4
    thanks. now i got the answer.

    it was much easier than i thought
     
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